angular diameter

noun

, Astronomy.

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

Word History and Origins

Origin of angular diameter¹

First recorded in 1870–75

Example Sentences

It appeared about fifteen degrees in angular diameter, showing that we had travelled some thirty thousand miles from it.

From Project Gutenberg

Its angular diameter at mean distance is 31′ 5″, or, say, just over ½°.

From Project Gutenberg

The constant, 220, is the reciprocal of the quotient of the angular diameter of the moon divided by 2.

From Project Gutenberg