arcus

[ ahr-kuh s ]
/ ˈɑr kəs /

noun, plural ar·cus. Meteorology.

a dense, horizontal, roll-shaped cloud sometimes occurring at the lower front portion of a cumulonimbus.

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compact
joined or packed together; closely and firmly united; dense; solid.
ready or inclined to fight.
not participating actively.
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Also called roll cloud.

Origin of arcus

< Latin: bow, arch

Words nearby arcus

arcuate ligament, arcuate nuclei, arcuate veins of kidney, arcuate zone, arcuation, arcus, arcus cornealis, arcus senilis, ardeb, ardebil, ardeid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

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Medical definitions for arcus

arcus
[ är′kəs ]

n. pl. arcus

A structure resembling a bent bow or an arch.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.