Definition of optical
- optical wavelength
- an optical galaxy
- an optical instrument
- optical microscopy
- optical character recognition
The company manufactures microscopes, telescopes, and other optical instruments.
an optical illusion that fools most people
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'optical.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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