[ee-kwuh-tawr-ee-uh l, -tohr-, ek-wuh-]
a telescope mounting having two axes of motion, one parallel to the earth's axis and one at right angles to it.
a telescope with such a mounting.
Origin of equatorial
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
of, like, or existing at or near the equator
astronautics (of a telescope) mounted on the perpendicular axes, one of which is parallel to the earth's axisan equatorial orbit
astronomy of or referring to the celestial equatorequatorial coordinates
an equatorial mounting for a telescope
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Online Etymology Dictionary, © 2010 Douglas Harper