Dictionary.com

arcus

[ ahr-kuhs ]
/ ˈɑr kəs /
Save This Word!

Definition of arcus

noun, plural ar·cus.Meteorology.
a dense, horizontal, roll-shaped cloud sometimes occurring at the lower front portion of a cumulonimbus.
QUIZ
GOOSES. GEESES. I WANT THIS QUIZ ON PLURAL NOUNS!
Test how much you really know about regular and irregular plural nouns with this quiz.
Question 1 of 9
Which of the following nouns has an irregular plural form?
Also called roll cloud.

Origin of arcus

<Latin: bow, arch
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use arcus in a sentence

Medical definitions for arcus

arcus
[ ärkəs ]

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.
FEEDBACK