Search this site:
Yahoo! Education > Reference > Dictionary > autumnal equinox

Definition of autumnal equinox


Reference


Word of the Day
competent
Definition: (adjective) having the skill and knowledge needed for a particular task; capable
Petersons.com
Add Word of the Day to your personalized My Yahoo! page:
Add to My Yahoo! View RSS Feed
About My Yahoo! and RSS »

 

autumnal equinox

NOUN:
  1. The point at which the ecliptic intersects the celestial equator, the sun having a southerly motion.
  2. The moment at which the sun passes through the autumnal equinox, about September 23, marking the beginning of autumn in the Northern Hemisphere.



Visit our partner's site
Provided by Houghton Mifflin
logoeReference -- Download this interactive reference software to your desktop computer


Search Dictionary:

 More on Yahoo! Education
 • Online and On-Campus Degree Programs
    MBAs  -  Technology Management  -  Education  -  Health  -  More

 • College & Grad School - A Comprehensive Guide
    College Search  -  Test Prep  -  Application Tips  -  Scholarship Search
 

The American Heritage® Dictionary of the English Language, Fourth Edition.
Copyright © 2000 by Houghton Mifflin Company.
Published by the Houghton Mifflin Company. All rights reserved.
Other Important Information
-