annulus
[an-yuh-luh s]
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noun, plural an·nu·li [an-yuh-lahy] /ˈæn yəˌlaɪ/, an·nu·lus·es.
a ring; a ringlike part, band, or space.
Geometry. the space between two concentric circles on a plane.
the veil remnant on a mushroom stalk.
a growth ring, as on the cross section of a tree trunk, that can be used to estimate age.
Origin of annulus
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for annulus
Historical Examples of annulus
Armillate: with a ring or annulus of raised or different tissue.
Explanation of Terms Used in EntomologyJohn. B. Smith
Ring: a circle or annulus, usually margining a discolored spot.
Explanation of Terms Used in EntomologyJohn. B. Smith
The annulus is not persistent, and the gills are crowded and notched.
Studies of American Fungi. Mushrooms, Edible, Poisonous, etc.George Francis Atkinson
Some have referred the name to the Latin or Italian, annulus, or annello.
Ancient Armour and Weapons in EuropeJohn Hewitt
This was called the astronomical ring, annulus astronomicus.
Finger-Ring LoreWilliam Jones
annulus
noun plural -li (-ˌlaɪ) or -luses
Word Origin for annulus
C16: from Latin, variant of ānulus ring
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Online Etymology Dictionary, © 2010 Douglas Harper
annulus
n. pl. an•nu•lus•es
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
annulus
[ăn′yə-ləs]
Plural annuluses annuli (ăn′yə-lī′)
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.