Optic \Op"tic\ ([o^]p"t[i^]k), Optical \Op"tic*al\
([o^]p"t[i^]*kal), a. [F. optique, Gr. 'optiko`s; akin to
'o`psis sight, 'o`pwpa I have seen, 'o`psomai I shall see,
and to 'o`sse the two eyes, 'o`ps face, L. oculus eye. See
Ocular, Eye, and cf. Canopy, Ophthalmia.]
1. Of, pertaining to, or using vision or sight; as, optical
illusions. [WordNet sense 2]
Syn: ocular, optic, visual.
[1913 Webster + WordNet 1.5]
The moon, whose orb
Through optic glass the Tuscan artist views.
--Milton.
[1913 Webster]
2. Of or pertaining to the eye; ocular; as, the optic nerves
(the first pair of cranial nerves) which are distributed
to the retina; the optic (or optical) axis of the eye. See
Illust. of Brain, and Eye. [WordNet sense 3]
[1913 Webster]
3. Relating to the science of optics or to devices designed
to assist vision; as, optical works; optical equipment.
[WordNet sense 1]
[1913 Webster +PJC]
Optic angle (Opt.), the angle included between the optic
axes of the two eyes when directed to the same point; --
sometimes called binocular parallax.
Optic axis. (Opt.)
(a) A line drawn through the center of the eye
perpendicular to its anterior and posterior surfaces.
In a normal eye it is in the direction of the optic
axis that objects are most distinctly seen.
(b) The line in a doubly refracting crystal, in the
direction of which no double refraction occurs. A
uniaxial crystal has one such line, a biaxial crystal
has two.
Optical circle (Opt.), a graduated circle used for the
measurement of angles in optical experiments.
Optical square, a surveyor's instrument with reflectors for
laying off right angles.
[1913 Webster]
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Parallax \Par"al*lax\, n. [Gr. ? alternation, the mutual
inclination of two lines forming an angle, fr. ? to change a
little, go aside, deviate; para` beside, beyond + ? to
change: cf. F. parallaxe. Cf. Parallel.]
1. The apparent displacement, or difference of position, of
an object, as seen from two different stations, or points
of view.
[1913 Webster]
2. (Astron.) The apparent difference in position of a body
(as the sun, or a star) as seen from some point on the
earth's surface, and as seen from some other conventional
point, as the earth's center or the sun.
[1913 Webster]
3. (Astron.) The annual parallax. See annual parallax,
below.
[PJC]
Annual parallax, the greatest value of the heliocentric
parallax, or the greatest annual apparent change of place
of a body as seen from the earth and sun; it is equivalent
to the parallax of an astronomical object which would be
observed by taking observations of the object at two
different points one astronomical unit (the distance of
the Earth from the sun) apart, if the line joining the two
observing points is perpendicular to the direction to the
observed object; as, the annual parallax of a fixed star.
The distance of an astronomical object from the Earth is
inversely proportional to the annual parallax. A star
which has an annual parallax of one second of an arc is
considered to be one parsec (3.26 light years) distant
from the earth; a star with an annual parallax of
one-hundredth second of an arc is 326 light years distant.
See parsec in the vocabulary, and stellar parallax,
below.
Binocular parallax, the apparent difference in position of
an object as seen separately by one eye, and then by the
other, the head remaining unmoved.
Diurnal parallax or Geocentric parallax, the parallax of
a body with reference to the earth's center. This is the
kind of parallax that is generally understood when the
term is used without qualification.
Heliocentric parallax, the parallax of a body with
reference to the sun, or the angle subtended at the body
by lines drawn from it to the earth and sun; as, the
heliocentric parallax of a planet.
Horizontal parallax, the geocentric parallx of a heavenly
body when in the horizon, or the angle subtended at the
body by the earth's radius.
Optical parallax, the apparent displacement in position
undergone by an object when viewed by either eye singly.
--Brande & C.
Parallax of the cross wires (of an optical instrument),
their apparent displacement when the eye changes its
position, caused by their not being exactly in the focus
of the object glass.
Stellar parallax, the annual parallax of a fixed star.
[1913 Webster]
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binocular parallax ibinocular parallax ibnocular parallax bibnocular parallax inocular parallax bbinocular parallax bniocular parallax biniocular parallax bnocular parallax biinocular parallax bioncular parallax binoncular parallax biocular parallax binnocular parallax bincoular parallax binocoular parallax bincular parallax binoocular parallax binouclar parallax binocuclar parallax binoular parallax binoccular parallax binocluar parallax binoculuar parallax binoclar parallax binocuular parallax binocualr parallax binoculalr parallax binocuar parallax binocullar parallax binoculra parallax binoculara parallax binoculr parallax binoculaar parallax binocula rparallax binocular rparallax binocula parallax binocularr parallax binocularp arallax binocular p arallax binocularparallax binocular parallax binocular aprallax binocular paprallax binocular arallax binocular pparallax binocular praallax binocular paraallax binocular prallax binocular paarallax binocular paarllax binocular pararllax binocular paallax binocular parrallax binocular parlalax binocular paralalax binocular parllax binocular paraallax binocular paralllax binocular paralax binocular paralllax binocular paralalx binocular parallalx binocular paralax binocular paralllax binocular parallxa binocular parallaxa binocular parallx binocular parallaax binocular parallxax binocular paralla binocular parallaxx finocular parallax bfinocular parallax fbinocular parallax ginocular parallax bginocular parallax gbinocular parallax hinocular parallax bhinocular parallax hbinocular parallax vinocular parallax bvinocular parallax vbinocular parallax ninocular parallax bninocular parallax nbinocular parallax inocular parallax b inocular parallax binocular parallax b8nocular parallax bi8nocular parallax b8inocular parallax b*nocular parallax bi*nocular parallax b*inocular parallax b9nocular parallax bi9nocular parallax b9inocular parallax bunocular parallax biunocular parallax buinocular parallax bonocular parallax 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pa$rallax binocular pa5allax binocular par5allax binocular pa5rallax binocular paeallax binocular pareallax binocular paerallax binocular patallax binocular partallax binocular patrallax binocular padallax binocular pardallax binocular padrallax binocular pafallax binocular parfallax binocular pafrallax binocular pagallax binocular pargallax binocular pagrallax binocular parqllax binocular paraqllax binocular parqallax binocular parwllax binocular parawllax binocular parwallax binocular parsllax binocular parasllax binocular parsallax binocular parxllax binocular paraxllax binocular parxallax binocular parzllax binocular parazllax binocular parzallax binocular par llax binocular para llax binocular par allax binocular parellax binocular parillax binocular parollax binocular parullax binocular paraiiax binocular paraliiax binocular paraiilax binocular paraooax binocular paralooax binocular paraoolax binocular parappax binocular paralppax binocular parapplax binocular parakkax binocular paralkkax binocular parakklax binocular para,,ax binocular paral,,ax binocular para,,lax binocular para..ax binocular paral..ax binocular para..lax binocular parallqx binocular parallaqx binocular parallqax binocular parallwx binocular parallawx binocular parallwax binocular parallsx binocular parallasx binocular parallsax binocular parallxx binocular parallaxx binocular parallxax binocular parallzx binocular parallazx binocular parallzax binocular parall x binocular paralla x binocular parall ax binocular parallex binocular parallix binocular parallox binocular parallux binocular parallaa binocular parallaxa binocular parallaax binocular parallas binocular parallaxs binocular parallasx binocular parallad binocular parallaxd binocular paralladx binocular parallaz binocular parallaxz binocular parallazx binocular parallac binocular parallaxc binocular parallacx binocular paralla binocular parallax binocular paralla x Definition commonly spelled as: Defanition or Defenition, Synonym as: Synonim, Sinonym or Sinonim, Thesaurus as: Thesorus or Thesauris, Dictionary as: Dictionery or Dictionry and Define is usually not misspelled. What does mispell meen? It Meens...
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