Airy disc

[ air-ee ]
/ ˈɛər i /

noun Optics.

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

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Lincolnesque

Origin of Airy disc

named after Sir George Biddel Airy (1801–92)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020