Dictionary > English Dictionary > Definition, synonym and antonym of Optical
Meaning of optical by Wiktionary Dictionary



    optical ( not comparable )

    1. Of, or relating to sight; visual
      Strabismus is an optical defect .
    2. Designed to assist or enhance sight
      A microscope is an optical instrument .
    3. Of, or relating to optics
      Refraction is an optical effect .
    4. Of, or relating to visible light
      Optical telescopes don't work when it is cloudy .
    5. Incorporating light-sensitive devices
      An optical switch opens the door automatically .


Explanation of optical by Wordnet Dictionary


    1. of or relating to or involving light or optics

    2. optical supplies
    3. relating to or using sight

    4. an optical illusion
    5. of or relating to or resembling the eye

    6. the optic ( or optical ) axis of the eye

    Definition of optical by GCIDE Dictionary


    1. Optic ( ŏptĭk ), Optical ( ŏptĭkal ), a. [F. optique, Gr. ὀπτικός; akin to ὄψις sight, ὄπωπα I have seen, ὄψομαι I shall see, and to ὄσσε the two eyes, ὄψ face, L. oculus eye. See Ocular, Eye, and cf. Canopy, Ophthalmia.]
      1. Of, pertaining to, or using vision or sight; as, “optical illusions”. [wns=2]

      Syn. -- ocular, optic, visual.

      The moon, whose orb

      Through optic glass the Tuscan artist views. Milton.

      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. [wns=3]

      3. Relating to the science of optics or to devices designed to assist vision; as, “optical works; optical equipment”. [wns=1]

      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 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. 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.