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

arcus

American  
[ahr-kuhs] / ˈɑr kəs /

noun

Meteorology.

plural

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


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.

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

O metam hanc tuus aeternum inclamaverit arcus: Stridat in hanc teli densior aura tui.

From The Complete Works of Richard Crashaw, Volume II (of 2) by Crashaw, Richard

Vocabar ante circulus Eramque curvus undique Ut alta solis orbita Et arcus ille nubium.

From A Budget of Paradoxes, Volume I by Smith, David Eugene

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "arcus" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com