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apertometer: Meaning and Definition of

ap•er•tom•e•ter

Pronunciation: (ap"ur-tom'i-tur), [key]
— n. Optics.
  1. an instrument for measuring the angular and numerical aperture of the objective lens of a microscope.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
aperitive aperture
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