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autocollimator

American  
[aw-toh-kol-uh-mey-ter] / ˌɔ toʊˈkɒl əˌmeɪ tər /

noun

Optics.

  1. an instrument combining the functions of a telescope and collimator, for detecting and measuring very small deviations in a beam of light.

Etymology

Origin of autocollimator

auto- 3 + collimator

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.