celestial equator: Meaning and Definition of

celes'tial equa'tor

Pronunciation: [key]
— Astron., Navig. Astron.,Navig.
  1. the great circle of the celestial sphere, lying in the same plane as the earth's equator. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.