annular

[an-yuh-ler]

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adjective

having the form of a ring.

(of a carpenter's nail) having a series of concentric grooves to improve holding power.

Nearby words

Origin of annular

1565–75; < Latin annulāris, equivalent to annul(us) ring (variant of ānulus) + -āris -ar¹

Related formsan·nu·lar·i·ty, nounan·nu·lar·ly, adverbin·ter·an·nu·lar, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for annular

We shall afterwards see how far this hypothesis is borne out by other evidence in the regions of annular reefs or atolls.
Principles of Geology|Charles Lyell
These tubes fill an annular area, the central un-tubed portion below the baffle cap B forming the vapor chamber.
Steam Turbines|Hubert E. Collins
The pump valves are annular, of brass, faced with rubber, and close by brass spiral spiral springs.
Scientific American Supplement, No. 492, June 6, 1885|Various
Growing by annular layers near the surface; belonging to the Exogens.
The Manual of the Botany of the Northern United States|Asa Gray

The spool fits fairly tight upon the end of the core, and when in position rests against an annular shoulder in the recess.
Electricity for Boys|J. S. Zerbe

British Dictionary definitions for annular

annular

adjective

ring-shaped; of or forming a ring

Derived Formsannularity (ˌænjʊˈlærɪtɪ), nounannularly, adverb

Word Origin for annular

C16: from Latin annulāris, from annulus, ānulus ring

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for annular

annular

adj.

"ring-shaped," 1570s, from French annulaire (16c.) or directly from Latin annularis "pertaining to a ring," from annulus, diminutive of anus "ring" (see anus). An annular eclipse (1727) is one in which the dark body of the moon is smaller than the disk of the sun, so that at the height of it the sun appears as a ring of light. Related: Annularity.

Medicine definitions for annular