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optical activity
optical art
optical brightener
optical character reader
optical character recognition
optical computer
optical disk
optical double star
optical fiber
optical glass
optical illusion
optical isomerism
optical mouse
optical rotation
optical scanner
optical semiconductor
optical sound
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optic

op·tic [ óptik ]


noun  (plural op·tics)
Definition:
 
1. instrument's lens: any lens or reflecting part in an optical instrument

2.  ( archaic )
Same as  eyen (sense 1)




adjective 
Definition:
 
of the eyes: belonging or relating to the eyes, or situated in or near the eye

[14th century. Via French or medieval Latin< Greek optikos< optos "seen, visible"]
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