the plane passing through the equator of the earth or another celestial body.
Origin of equatorial plane
First recorded in 1890–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
The plane that contains all of the centromeres and their spindle attachments during metaphase of mitosis.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.