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optic vesicle
optical
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
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optical disk
op·ti·cal disk (plural op·ti·cal disks)


noun 
Definition:
 
computer disk read by laser: a rigid computer storage disk with data stored as tiny pits in the plastic coating, readable by laser beam
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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