Optical

2 definitions found

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

  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]

From WordNet (r) 2.0 [wn]:

  optical
       adj 1: relating to or using sight; "ocular inspection"; "an optical
              illusion"; "visual powers"; "visual navigation" [syn:
              {ocular}, {optic}, {visual}]
       2: of or relating to or involving light or optics; "optical
          supplies"
       3: of or relating to or resembling the eye; "ocular muscles";
          "an ocular organ"; "ocular diseases"; "the optic (or
          optical) axis of the eye"; "an ocular spot is a pigmented
          organ or part believed to be sensitive to light" [syn: {ocular},
           {optic}, {opthalmic}]