Meaning

noun (astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascension for an observer at a particular location and time of d

originAttested early 14th century, of onomatopoeic origin. Compare Danish ha, Dutch ha, Finnish ha, Hungarian ha, Latin ha, Latvian ha, Swedish ha.

Etymology from Wiktionary, CC BY-SA 3.0