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| op·tics [ óptiks ] |
noun |
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| Definition: |
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study of light: the study of light or electromagnetic radiation in the visible, infrared, and ultraviolet regions
(
takes a singular verb
)
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plural noun |
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| Definition: |
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lens-equipped instruments: instruments used for detecting electromagnetic radiation and for attaining highly accurate long-range vision
(
takes a plural verb
)
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