Dictionary.com
Thesaurus.com
Showing results for arcus. Search instead for arculi.

arcus

American  
[ahr-kuhs] / ˈɑr kəs /

noun

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


Other Word Forms

Noun Inflected Forms

Etymology

Origin of arcus

< Latin: bow, arch

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

One evening, ominous, low-lying tube-shaped clouds known as arcus formed, and whitecaps appeared in the waves.

From The Wall Street Journal Nov. 30, 2025

Video shows a shelf cloud - a type of arcus cloud - form before a thunderstorm hit Portland.

From BBC Sep. 13, 2022

To Cassiopeia, she added, “Next time, try pluvius arcus, dear; the meaning is clearer.”

From "The Incorrigible Children of Ashton Place: Book I: The Mysterious Howling" by Maryrose Wood

Practically every one with a well-marked arcus senilis has arteriosclerosis, but vice versa not every one with even marked arteriosclerosis has an arcus senilis.

From Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. by Warfield, Louis Marshall

In elderly persons we ought always to look for the arcus senilis, which is a sign of a tendency to fatty degeneration.

From A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases by Various

Vocabulary.com logo
by dictionary.com

Dictionary.com's Learning Companion

Go beyond just looking up words.
Remember them forever with VocabTrainer.

Start training