• Optical

    Origin

    optic + -al

    Full definition of optical

    Adjective

    optical

    1. Of, or relating to sight; visualStrabismus is an optical defect.
    2. Designed to assist or enhance sightA microscope is an optical instrument.
    3. Of, or relating to opticsRefraction is an optical effect.
    4. Of, or relating to visible lightOptical telescopes don't work when it is cloudy.
    5. Incorporating light-sensitive devicesAn optical switch opens the door automatically.
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