optic
adjective
[ ˈɒptɪk ]
• relating to the eye or vision.
optic
noun
• a lens or other optical component in an optical instrument.
• the eye.
• a device fastened to the neck of an inverted bottle for measuring out spirits.
Origin:
late Middle English: from French optique or medieval Latin opticus, from Greek optikos, from optos ‘seen’.
