annulus Hear it!

annulus definition

an·nu·lus (an′yo̵̅o̅ ləs, -yə-)

noun pl. annuli -·li′ (-lī′) or annuluses -·luses

any ring or ringlike part, mark, etc.

Etymology: L annulus, for anulus: see annular

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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