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angular diameter

American  

noun

Astronomy.

  1. the angle that the apparent diameter of a celestial object subtends at the eye of the observer.

Etymology

Origin of angular diameter

First recorded in 1870–75

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.

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