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Airy disc

American  
[air-ee] / ˈɛər i /

noun

Optics.

  1. the bright central part of the diffraction pattern of light from a point source that is diffracted by a circular aperture.

Etymology

Origin of Airy disc

Named after Sir George Biddel Airy (1801–92)

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.