[1] : The Collaborative International Dictionary of English v.0.48

optic \op"tic\ o^p"ti^k, optical \op"tical\
   o^p"ti^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
see also:
ocular eye canopy ophthalmia brain optic angle 
binocular parallax optic axis optical circle optical square 

Optical >> O Words
Optical, definition of term: Optical
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Square >> S Words
Square, definition of term: Square
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Square Meter >> S Words
Square Meter, definition of term: Square Meter
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Square Inch >> S Words
Square Inch, definition of term: Square Inch
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Square Foot >> S Words
Square Foot, definition of term: Square Foot
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Square Mile >> S Words
Square Mile, definition of term: Square Mile
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Square Deal >> S Words
Square Deal, definition of term: Square Deal
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Square Number >> S Words
Square Number, definition of term: Square Number
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Square Up >> S Words
Square Up, definition of term: Square Up
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Square Shooter >> S Words
Square Shooter, definition of term: Square Shooter
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