rille Hear it!

rille definition

rille or rill (ril)

noun

Astron. any of several long, narrow trenches or valleys on the moon's surface

Etymology: Ger rille, a furrow; akin to rill

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

Comments


Do you have more to add? Sign in to share your linguistic knowledge or observation.

Connect with Facebook