Apertometer

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    An instrument designed to measure the numerical aperture of a lens or objective of a microscope.

Etymology

From aperture + -o- + -meter.

Related phrases

numerical aperture

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.