Fr.: être d'avis que
To hold or express an opinion.
Verb for → opinion.
1) A belief or judgment that rests on grounds insufficient to produce complete
certainty (Dictionary.com). See also: → public opinion.
M.E., from O.Fr., from L. opinion- "opinion, conjecture; appreciation," from opinari "to think, judge, suppose," from PIE *op- "to choose."
Pažân, from Pashtu pežân, Sogd. patzân, Khotanese paysân- "to know;" Av. paiti-zan- "to recognize, acknowledge, appreciate;" from prefix paiti- + zan- "to know, have knowledge;" cf Mod.Pers. farzâné "intelligent; wise," dân-, dânestan "to know," variant šenâxtan "to know, recognize," → science.
Fr.: limite d'Oppenheimer-Volkoff
The upper bound to the mass of a → neutron star, the mass beyond which the pressure of neutron → degenerate matter is not capable of preventing the → gravitational collapse which will lead to the formation of a → black hole. Modern estimates range from approximately 1.5 to 3.0 → solar masses. The uncertainty in the value reflects the fact that the → equation of state for → overdense matter is not well-known.
Oppenheimer, J.R., Volkoff, G.M., 1939, Physical Review 55, 374. Named after Robert Oppenheimer (1904-1967), an American theoretical physicist, and George Volkoff (1914-2000), a Canadian physicist, who first calculated this limit. Oppenheimer is widely known for his role as the scientific director of the Manhattan Project, the World War II effort to develop the first nuclear weapons at the secret Los Alamos laboratory in New Mexico; → limit.
Fr.: opposant, adversaire
A person who is on an opposing side in a game, contest, controversy, or the like; adversary (Dictionary.com).
L. opponent-, p.p. of opponere "to oppose, to object to," literally "set against, set opposite," from op- variant of ob- before p "against" + ponere "to put, set, place," → position.
1) Appropriate, favorable, or suitable.
M.E., from O.Fr. opportun and directly from L. opportunus "fit, convenient, suitable," from the phrase ob portum veniens "coming toward a port," literally "a wind blowing to harbor," from ob "to, toward" + portus "access, harbor."
Nikvâ "appropriate, suitable," from nik, nêk, neku "good, beautiful, elegant;" Mid.Pers. nêk, nêvak, nêkôg "good, beautiful;" O.Pers. naiba- + -vâ relation suffix (as in pišvâ, pilévâ); alternatively, nikvâ "good/appropriate wind," from nik + vâ "wind," variant of bâd, → wind, in several dialects.
The policy or practice, as in politics, business, or one's personal affairs, of adapting actions, decisions, etc., to expediency or effectiveness regardless of the sacrifice of ethical principles (Dictionary.com).
A person who adapts his actions, responses, etc, to take advantage of opportunities, circumstances, etc. (Dictionary.com).
1) An appropriate or favorable time or → occasion.
Fr.: s'opposer à, faire opposition à; opposer
1) To act against or provide resistance to.
M.E., from O.Fr. oposer "to oppose, resist; contradict," from poser "to place, lay down," blended with L. opponere "to oppose, to object," → position.
Pâdistidan, infinitive from pâdist, → opposition.
1) ru-be-ru; 2) pâdistin; 3) pâdcem
Fr.: 1) opposé, d'en face; 2) contraire, opposé; 3) antonyme
1) Situated, placed, or lying face to face with something else or each
other, or in corresponding positions with relation to an intervening
line, space, or thing: opposite ends of a room (Dictionary.com).
M.E., from M.Fr., from L. oppositus, p.p. of opponere, → opposition.
1, 2) pâdist; 3, 4) pâdistân
1) The action of opposing, resisting, or combating.
Verbal noun of → oppose.
Pâdist "standing against," from pâd-
"agaist, contrary to," → anti-,
+ ist present stem of istâdan "to stand"
O.Pers./Av. sta- "to stand; to set;"
Av. hištaiti; cf. Skt. sthâ- "to stand;"
Gk. histemi "put, place, weigh," stasis "a standing still;"
L. stare "to stand;" Lith. statau "place;" Goth. standan;
PIE base *sta- "to set, stand").
To make a choice; choose (usually followed by for).
From Fr. opter "to choose," from L. optare "to choose, desire, wish for," from L. optare "to desire, choose," from PIE root *op- "to choose, prefer."
Optidan, from L. optare, as above.
Of, relating to, or constituting a verbal mood that is expressive of wish or desire.
Optâné, optmand, from opt present stem of optidan, → opt, + adj. suffixes -âné, -mand. -yi.
1) nuri, nurik; 2) didgâni
1) Of or pertaining to the eye or sight.
From M.Fr. optique, from M.L. opticus "of sight or seeing," from Gk. optikos "of or having to do with sight," from optos "seen, visible," from op-, root of opsesthai "be going to see," related to ops "eye," from PIE *okw- "eye/see."
1) Nuri, nurik, from nur, → light + -i, -ik
adj. suffix → -ic.
Fr.: axe optique
The direction in a doubly refracting crystal in which light is propagated without double refraction.
1) nuri, nurik; 2) didgâni
1) Of, pertaining to, or applying optics or the principles of optics.
Fr.: aberration optique
Fr.: activité optique
The property possessed by some substances and their solutions of rotating the plane of vibration of → polarized light. When a beam of → linearly polarized light is sent through an optically active substance, such as crystalline quartz and sugar solution, the direction of vibration of the emerging linearly polarized light is found to be different from the original direction. Those which rotate the → plane of polarization to the right, for an observer looking in the incoming beam, are called → dextrorotatory or right handed; those which rotate it to the left, → levorotatory or left handed. Optical activity may be due to an asymmetry of molecules of a substance (solutions of cane sugar) or it may be a property of a crystal as a whole (crystalline quartz).
Fr.: analyse optique
The mathematical evaluation of an optical system to determine its basic optical properties and image quality characteristics.
Fr.: autocorrélateur optique
An instrument used to test lenses by utilizing the → optical transfer function. It consists of a HeNe laser, a beamsplitter and two mirrors.