Scientist Quotations - Categories Index for Initial O
This list includes science quotes from archaeologists, biologists, chemists, geologists, inventors and inventions, mathematicians, physicists plus pioneers in medicine, science events and technology.
This index gives quotes listed under category headings. When the category is a scientist name, the index is for any reference made ABOUT the scientist BY another person.
Oak (16)
Oak Tree (1)
Oar (2)
Oarsman (1)
Oasis (1)
Oath (10)
Ob (1)
Obduracy (1)
Obdurate (1)
Obedience (20)
Obedient (9)
Obelisk (2)
Obervation (4)
Obesity (5)
Obey (46)
Object (435)
Object-Oriented (1)
Objected (1)
Objection (34)
Objectionable (1)
Objectionableness (1)
Objective (95)
Objectively (6)
Objectivity (17)
Objectivivity (1)
Obligation (26)
Obligatory (3)
Oblige (6)
Obliged (6)
Oblique (1)
Obliterate (2)
Oblivion (10)
Oblivious (9)
Oblong (1)
Obscene (3)
Obscenity (4)
Obscurantism (3)
Obscuration (1)
Obscure (65)
Obscuring (1)
Obscurity (28)
Obsequious (1)
Observable (21)
Observance (1)
Observation (590)
Observational (15)
Observatory (18)
Observe (178)
Observed (149)
Observer (48)
Observing (2)
Obsessed (2)
Obsession (13)
Obsessive (3)
Obsessiveness (1)
Obsolescence (4)
Obsolescent (2)
Obsolete (15)
Obstacle (42)
Obstetrician (1)
Obstetrics (3)
Obstinacy (3)
Obstinate (5)
Obstinately (2)
Obstruct (3)
Obstruction (4)
Obtain (163)
Obtainable (1)
Obtaining (5)
Obtuse (2)
Obtuseness (1)
Obviation (1)
Obvious (128)
Obviously (11)
Obviousness (3)
Occam (1)
Occam's Razor (3)
Occasion (87)
Occasional (23)
Occasionally (5)
Occult (9)
Occultism (1)
Occupant (1)
Occupation (51)
Occupational Disease (1)
Occupied (45)
Occupy (27)
Occupying (1)
Occur (151)
Occurence (3)
Occurred (2)
Occurrence (53)
Occurring (1)
Ocean (213)
Ocean Acidification (1)
Ocean Floor (6)
Ocean Health Index (1)
Ocean Pollution (10)
Oceanic (1)
Oceanographer (1)
Oceanography (17)
Oceanus (1)
Ockham's Razor (2)
Octahedron (1)
Octane (1)
Octave (3)
Octavo (1)
October (5)
Octohedron (1)
Octopus (2)
Ocular (3)
Odd (15)
Oddball (2)
Oddity (4)
Oddly (3)
Odds (6)
Ode (3)
Odious (3)
Odor (11)
Odour (1)
Odyssey (1)
Oedipus (2)
Oedipus Complex (1)
OEM (1)
Oenipodes (1)
Of Course (22)
Off (1)
Off The Shelf (1)
Off-Chance (1)
Off-Shore (1)
Offence (4)
Offend (7)
Offense (4)
Offensive (4)
Offer (142)
Offered (1)
Offering (2)
Offhand (1)
Office (71)
Officer (12)
Official (7)
Offset (3)
Offshoot (1)
Offshore (3)
Offspring (27)
Oft (1)
Oft-Times (1)
Often (109)
Ohio (1)
Ohm (5)
Ohm's Law (1)
Oikos (1)
Oil (65)
Oil Company (1)
Oil Paint (1)
Oil Rig (1)
Oil Shale (1)
Oil Shortage (1)
Oil Spill (6)
Oil Well (1)
Oily (1)
Ointment (1)
OK (1)
Okapis (1)
Old (496)
Old Age (35)
Old Man (5)
Old West (2)
Old World (8)
Old-Fashioned (9)
Old-Growth (2)
Old-Time (1)
Older (7)
Oldest (9)
Olefin (1)
Olfactory (2)
Oligocene (1)
Olive (1)
Olive Oil (1)
Oliver (1)
Olmstead_Francis (1)
Ologist (1)
Olympic (1)
Olympic Peninsula (1)
Olympus (1)
Omelet (1)
Omen (2)
Ominous (5)
Omission (1)
Omit (12)
Omitted (1)
Omne Exit Infinitum (1)
Omnibeneficent (1)
Omnibus (2)
Omnipotence (4)
Omnipotent (13)
Omnipresent (3)
Omniscience (3)
Omniscient (6)
Omnivore (1)
On The Contrary (1)
On The Other Hand (40)
Once (4)
One (6)
One-Celled (1)
One-Eyed (1)
One-Fortieth (1)
One-Fourth (1)
One-Page (1)
One-Sided (2)
One-Thing-After-Another (1)
One-Thing-Reciprocating-Another (1)
One-Third (1)
One-Thirty (1)
One-Way (2)
Oneness (6)
Oneself (33)
Onion (9)
Online (4)
Onlooker (1)
Only (2)
Ontogeny (10)
Ontography (1)
Ontological (2)
Ontology (1)
Onward (6)
Ooze (2)
Opal (1)
Opaque (7)
OpArt (1)
OPEC (1)
Open (277)
Open Access (1)
Open Mind (1)
Open Space (1)
Open Up (2)
Open_Source (1)
Open-Minded (2)
Open-Mouthed (1)
Open-Stack (1)
Opened (2)
Opener (1)
Opening (15)
Opening Night (1)
Openly (1)
Openness (8)
Opera (3)
Operand (1)
Operant (1)
Operat (1)
Operate (19)
Operating (4)
Operating Room (1)
Operating Table (2)
Operation (219)
Operational Research (1)
Operations (107)
Operative (10)
Operator (4)
Ophelia (2)
Ophthalmoscope (1)
Opiate (2)
Opinion (289)
Opium (7)
Opossum (3)
Opponent (23)
Opportune (1)
Opportunist (3)
Opportunistic (1)
Opportunity (93)
Oppose (27)
Opposed (3)
Opposing (1)
Opposite (110)
Opposition (49)
Oppressed (2)
Oppression (6)
Oppressive (2)
Opprobium (1)
Opprobrium (1)
Opt (1)
Opthalmologist (1)
Optic (2)
Optical (11)
Optical Activity (1)
Optical Fibre (1)
Optical Grating (1)
Optician (1)
Opticks (2)
Optics (24)
Optimal (4)
Optimally (2)
Optimism (17)
Optimist (8)
Optimistic (1)
Optimize (1)
Optimum (2)
Option (10)
Optional (3)
Optometry (1)
Or- Ganization (1)
Oracle (5)
Oral (2)
Orange (15)
Orange-Painted (1)
Orangutan (1)
Oration (2)
Orator (3)
Oratory (1)
Orb (20)
Orbit (85)
Orbital (4)
Orbitals (2)
Orbiting (1)
Orchard (4)
Orchestra (3)
Orchestration (2)
Orchid (4)
Ordain (4)
Ordained (2)
Ordainer (1)
Ordeal (1)
Order (638)
Order Of Magnitude (5)
Ordered (2)
Ordering (1)
Orderliness (9)
Orderly (38)
Ordinance (2)
Ordinarily (1)
Ordinariness (1)
Ordinary (165)
Ordinate (1)
Ordnance (2)
Ore (14)
Oregon (1)
Organ (118)
Organ Donation (3)
Organ Donations (1)
Organ Pipe (1)
Organelle (1)
Organic (161)
Organic Chemist (2)
Organic Chemistry (41)
Organic Compound (3)
Organic Life (2)
Organic Reaction (1)
Organic-Only (1)
Organically (1)
Organisation (7)
Organise (3)
Organised (1)
Organism (231)
Organist (1)
Organization (118)
Organize (33)
Organized (9)
Organizer (1)
Organon (2)
Orgasm (2)
Orgel's Rule (1)
Orgy (3)
Orient (5)
Oriental (1)
Orientation (3)
Oriented (1)
Orifice (2)
Origami (1)
Origin (250)
Origin Of Life (37)
Origin Of Man (9)
Origin Of Species (42)
Origin Of The Earth (13)
Origin Of The Solar System (2)
Origin Of The Species (1)
Origin Of The Universe (20)
Original (60)
Original Sin (1)
Originality (21)
Originally (7)
OriginalMatter (1)
Originate (39)
Origination (7)
Originative (1)
Originator (7)
Orion (1)
Orkney (1)
Ornament (20)
Ornamentation (1)
Ornithologist (1)
Ornithology (21)
Orogeny (1)
Orphan (1)
Orpheus (2)
Orr_Allen (1)
Orrery (1)
Orse (1)
Orthodox (4)
Orthodoxy (11)
Orthogonal (1)
Orthomolecular (1)
Orville (1)
Oryx (1)
Osama (1)
Oscillate (2)
Oscillation (13)
Osmium (3)
Osmosis (3)
Osprey (1)
Ossicle (1)
Ossification (1)
Ossified (2)
Ossifrage (1)
Ostensibly (1)
Ostentation (1)
Osteoporosis (1)
Ostracize (1)
Ostrich (1)
Ostwald_Carl (2)
Ostwald_Friedrich (1)
OTEC (1)
Other (2232)
Other Hand (2)
Others (1)
Otherwise (26)
Otter (2)
Otto_Shawn (1)
Ought (3)
Ouml (1)
Ounce (9)
Ourang-Outang (1)
Ours (4)
Ourself (20)
Ourselves (247)
Ouside (1)
Ousting (1)
Out (2)
Out Of Order (2)
Out Of Reach (1)
Out Of Touch (1)
Out-Blaz (1)
Out-Of-Date (1)
Out-Of-Door (1)
Out-OfDoors (1)
Outburst (1)
Outcast (1)
Outcome (15)
Outcrop (1)
Outcry (3)
Outdated (1)
Outdoors (3)
Outer (13)
Outer Space (6)
Outer World (1)
Outermost (1)
Outfit (2)
Outgoing (1)
Outgrow (4)
Outgrowth (3)
Outlast (3)
Outlaw (1)
Outlawing (1)
Outlet (3)
Outline (11)
Outlive (4)
Outlook (32)
Outmoded (2)
Outnumber (2)
Outperform (1)
Outpost (2)
Outpouring (1)
Output (12)
Outrage (3)
Outrageous (1)
Outrank (1)
Outrowth (1)
Outrun (2)
Outsell (1)
Outset (7)
Outside (141)
Outsider (7)
Outskirts (2)
Outsourcing (1)
Outspokenness (1)
Outstanding (16)
Outstretched (1)
Outstrip (4)
Outward (7)
Outwards (1)
Outweigh (2)
Outweighed (1)
Outwit (6)
Oval Office (1)
Ovarium (1)
Ovary (2)
Oven (5)
Over-Hyped (1)
Over-Population (1)
Over-Rated (1)
Over-Ride (2)
Over-Strict (1)
Overabundance (1)
Overall (10)
Overbalancing (1)
Overboard (3)
Overbuild (1)
Overburdening (1)
Overcivilised (1)
Overcoat (1)
Overcome (40)
Overcoming (3)
Overdo (2)
Overdose (1)
Overdraft (1)
Overeat (1)
Overeating (1)
Overemphasis (1)
Overestimate (3)
Overfishing (27)
Overflow (10)
Overgrazing (3)
Overhaul (1)
Overhead (1)
Overjoyed (1)
Overlap (9)
Overload (1)
Overlook (32)
Overlooking (3)
Overly (1)
Overmodest (1)
Overnight (2)
Overpopulate (1)
Overpopulation (6)
Overpower (1)
Overpowering (1)
Overrated (1)
Override (1)
Overruling (1)
Overseas (1)
Overseer (2)
Overshadow (2)
Overshoe (1)
Overshot (1)
Oversight (4)
Oversimplification (1)
Overstate (1)
Overstatement (1)
Overstay (2)
Overt (1)
Overtake (2)
Overthrow (5)
Overthrown (8)
Overtime (1)
Overtone (3)
Overturn (2)
Overturning (1)
Overuse (1)
Overview (2)
Overweening (1)
Overweight (1)
Overwhelm (5)
Overwhelmed (6)
Overwhelming (30)
Overwhelmingly (3)
Overwork (2)
Overworked (1)
Ovulation (1)
Ovule (1)
Ovum (4)
Owe (70)
Owing (39)
Owl (3)
Owner (5)
Ownership (1)
Owning (1)
Ox (5)
Oxalic Acid (1)
Oxcart (1)
Oxen (8)
Oxford (16)
Oxidation (8)
Oxide (1)
OxideLens (1)
Oxydonor (1)
Oxygen (77)
Oxymoron (1)
Oyster (12)
Oyu (1)
Ozone (7)
Ozone Layer (3)
Oak Tree (1)
Oar (2)
Oarsman (1)
Oasis (1)
Oath (10)
Ob (1)
Obduracy (1)
Obdurate (1)
Obedience (20)
Obedient (9)
Obelisk (2)
Obervation (4)
Obesity (5)
Obey (46)
Object (435)
Object-Oriented (1)
Objected (1)
Objection (34)
Objectionable (1)
Objectionableness (1)
Objective (95)
Objectively (6)
Objectivity (17)
Objectivivity (1)
Obligation (26)
Obligatory (3)
Oblige (6)
Obliged (6)
Oblique (1)
Obliterate (2)
Oblivion (10)
Oblivious (9)
Oblong (1)
Obscene (3)
Obscenity (4)
Obscurantism (3)
Obscuration (1)
Obscure (65)
Obscuring (1)
Obscurity (28)
Obsequious (1)
Observable (21)
Observance (1)
Observation (590)
Observational (15)
Observatory (18)
Observe (178)
Observed (149)
Observer (48)
Observing (2)
Obsessed (2)
Obsession (13)
Obsessive (3)
Obsessiveness (1)
Obsolescence (4)
Obsolescent (2)
Obsolete (15)
Obstacle (42)
Obstetrician (1)
Obstetrics (3)
Obstinacy (3)
Obstinate (5)
Obstinately (2)
Obstruct (3)
Obstruction (4)
Obtain (163)
Obtainable (1)
Obtaining (5)
Obtuse (2)
Obtuseness (1)
Obviation (1)
Obvious (128)
Obviously (11)
Obviousness (3)
Occam (1)
Occam's Razor (3)
Occasion (87)
Occasional (23)
Occasionally (5)
Occult (9)
Occultism (1)
Occupant (1)
Occupation (51)
Occupational Disease (1)
Occupied (45)
Occupy (27)
Occupying (1)
Occur (151)
Occurence (3)
Occurred (2)
Occurrence (53)
Occurring (1)
Ocean (213)
Ocean Acidification (1)
Ocean Floor (6)
Ocean Health Index (1)
Ocean Pollution (10)
Oceanic (1)
Oceanographer (1)
Oceanography (17)
Oceanus (1)
Ockham's Razor (2)
Octahedron (1)
Octane (1)
Octave (3)
Octavo (1)
October (5)
Octohedron (1)
Octopus (2)
Ocular (3)
Odd (15)
Oddball (2)
Oddity (4)
Oddly (3)
Odds (6)
Ode (3)
Odious (3)
Odor (11)
Odour (1)
Odyssey (1)
Oedipus (2)
Oedipus Complex (1)
OEM (1)
Oenipodes (1)
Of Course (22)
Off (1)
Off The Shelf (1)
Off-Chance (1)
Off-Shore (1)
Offence (4)
Offend (7)
Offense (4)
Offensive (4)
Offer (142)
Offered (1)
Offering (2)
Offhand (1)
Office (71)
Officer (12)
Official (7)
Offset (3)
Offshoot (1)
Offshore (3)
Offspring (27)
Oft (1)
Oft-Times (1)
Often (109)
Ohio (1)
Ohm (5)
Ohm's Law (1)
Oikos (1)
Oil (65)
Oil Company (1)
Oil Paint (1)
Oil Rig (1)
Oil Shale (1)
Oil Shortage (1)
Oil Spill (6)
Oil Well (1)
Oily (1)
Ointment (1)
OK (1)
Okapis (1)
Old (496)
Old Age (35)
Old Man (5)
Old West (2)
Old World (8)
Old-Fashioned (9)
Old-Growth (2)
Old-Time (1)
Older (7)
Oldest (9)
Olefin (1)
Olfactory (2)
Oligocene (1)
Olive (1)
Olive Oil (1)
Oliver (1)
Olmstead_Francis (1)
Ologist (1)
Olympic (1)
Olympic Peninsula (1)
Olympus (1)
Omelet (1)
Omen (2)
Ominous (5)
Omission (1)
Omit (12)
Omitted (1)
Omne Exit Infinitum (1)
Omnibeneficent (1)
Omnibus (2)
Omnipotence (4)
Omnipotent (13)
Omnipresent (3)
Omniscience (3)
Omniscient (6)
Omnivore (1)
On The Contrary (1)
On The Other Hand (40)
Once (4)
One (6)
One-Celled (1)
One-Eyed (1)
One-Fortieth (1)
One-Fourth (1)
One-Page (1)
One-Sided (2)
One-Thing-After-Another (1)
One-Thing-Reciprocating-Another (1)
One-Third (1)
One-Thirty (1)
One-Way (2)
Oneness (6)
Oneself (33)
Onion (9)
Online (4)
Onlooker (1)
Only (2)
Ontogeny (10)
Ontography (1)
Ontological (2)
Ontology (1)
Onward (6)
Ooze (2)
Opal (1)
Opaque (7)
OpArt (1)
OPEC (1)
Open (277)
Open Access (1)
Open Mind (1)
Open Space (1)
Open Up (2)
Open_Source (1)
Open-Minded (2)
Open-Mouthed (1)
Open-Stack (1)
Opened (2)
Opener (1)
Opening (15)
Opening Night (1)
Openly (1)
Openness (8)
Opera (3)
Operand (1)
Operant (1)
Operat (1)
Operate (19)
Operating (4)
Operating Room (1)
Operating Table (2)
Operation (219)
Operational Research (1)
Operations (107)
Operative (10)
Operator (4)
Ophelia (2)
Ophthalmoscope (1)
Opiate (2)
Opinion (289)
Opium (7)
Opossum (3)
Opponent (23)
Opportune (1)
Opportunist (3)
Opportunistic (1)
Opportunity (93)
Oppose (27)
Opposed (3)
Opposing (1)
Opposite (110)
Opposition (49)
Oppressed (2)
Oppression (6)
Oppressive (2)
Opprobium (1)
Opprobrium (1)
Opt (1)
Opthalmologist (1)
Optic (2)
Optical (11)
Optical Activity (1)
Optical Fibre (1)
Optical Grating (1)
Optician (1)
Opticks (2)
Optics (24)
Optimal (4)
Optimally (2)
Optimism (17)
Optimist (8)
Optimistic (1)
Optimize (1)
Optimum (2)
Option (10)
Optional (3)
Optometry (1)
Or- Ganization (1)
Oracle (5)
Oral (2)
Orange (15)
Orange-Painted (1)
Orangutan (1)
Oration (2)
Orator (3)
Oratory (1)
Orb (20)
Orbit (85)
Orbital (4)
Orbitals (2)
Orbiting (1)
Orchard (4)
Orchestra (3)
Orchestration (2)
Orchid (4)
Ordain (4)
Ordained (2)
Ordainer (1)
Ordeal (1)
Order (638)
Order Of Magnitude (5)
Ordered (2)
Ordering (1)
Orderliness (9)
Orderly (38)
Ordinance (2)
Ordinarily (1)
Ordinariness (1)
Ordinary (165)
Ordinate (1)
Ordnance (2)
Ore (14)
Oregon (1)
Organ (118)
Organ Donation (3)
Organ Donations (1)
Organ Pipe (1)
Organelle (1)
Organic (161)
Organic Chemist (2)
Organic Chemistry (41)
Organic Compound (3)
Organic Life (2)
Organic Reaction (1)
Organic-Only (1)
Organically (1)
Organisation (7)
Organise (3)
Organised (1)
Organism (231)
Organist (1)
Organization (118)
Organize (33)
Organized (9)
Organizer (1)
Organon (2)
Orgasm (2)
Orgel's Rule (1)
Orgy (3)
Orient (5)
Oriental (1)
Orientation (3)
Oriented (1)
Orifice (2)
Origami (1)
Origin (250)
Origin Of Life (37)
Origin Of Man (9)
Origin Of Species (42)
Origin Of The Earth (13)
Origin Of The Solar System (2)
Origin Of The Species (1)
Origin Of The Universe (20)
Original (60)
Original Sin (1)
Originality (21)
Originally (7)
OriginalMatter (1)
Originate (39)
Origination (7)
Originative (1)
Originator (7)
Orion (1)
Orkney (1)
Ornament (20)
Ornamentation (1)
Ornithologist (1)
Ornithology (21)
Orogeny (1)
Orphan (1)
Orpheus (2)
Orr_Allen (1)
Orrery (1)
Orse (1)
Orthodox (4)
Orthodoxy (11)
Orthogonal (1)
Orthomolecular (1)
Orville (1)
Oryx (1)
Osama (1)
Oscillate (2)
Oscillation (13)
Osmium (3)
Osmosis (3)
Osprey (1)
Ossicle (1)
Ossification (1)
Ossified (2)
Ossifrage (1)
Ostensibly (1)
Ostentation (1)
Osteoporosis (1)
Ostracize (1)
Ostrich (1)
Ostwald_Carl (2)
Ostwald_Friedrich (1)
OTEC (1)
Other (2232)
Other Hand (2)
Others (1)
Otherwise (26)
Otter (2)
Otto_Shawn (1)
Ought (3)
Ouml (1)
Ounce (9)
Ourang-Outang (1)
Ours (4)
Ourself (20)
Ourselves (247)
Ouside (1)
Ousting (1)
Out (2)
Out Of Order (2)
Out Of Reach (1)
Out Of Touch (1)
Out-Blaz (1)
Out-Of-Date (1)
Out-Of-Door (1)
Out-OfDoors (1)
Outburst (1)
Outcast (1)
Outcome (15)
Outcrop (1)
Outcry (3)
Outdated (1)
Outdoors (3)
Outer (13)
Outer Space (6)
Outer World (1)
Outermost (1)
Outfit (2)
Outgoing (1)
Outgrow (4)
Outgrowth (3)
Outlast (3)
Outlaw (1)
Outlawing (1)
Outlet (3)
Outline (11)
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In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion.
(1987) -- 
