Word.ws English Dictionary

Plural of cirrus

irregular plural

The plural of cirrus is cirri.

Forms of cirrus

Singularcirrus /ˈsɪɹəs/
Pluralcirri /ˈsɪɹaɪ/
Countablecountable

Cirri in a sentence

  • The blue sky is glossy and fat with heat, a few thin cirri sheared to blown strands like hair at the rims.1996, David Foster Wallace, Infinite Jest […], Boston, Mass.; New York, N.Y.: Little, Brown and Company, →ISBN, page 15
  • Moreover, most species have a cirral pattern which - at least partially - closely resembles that of 18-cirri hypotrichs, including the formation from six (I-VI) anlagen.2011, Helmut Berger, Monograph of the Gonostomatidae and Kahliellidae. From the entry anlage

Meaning of cirrus

  1. noun Synonym of tendril (“a thin, spirally coiling stem that attaches a plant to its support”).
  2. noun A thin tendril-like appendage, such as a barbel (“whisker-like sensory organ around the mouth”) of some fish, a cilium of some species of protists, or a foot of some crustaceans of the infraclass Cirripedia.
  3. noun A tuft of ornamental feathers.

Full definition of cirrus

Nouns ending in -us: plural -i

Questions about the plural of cirrus

What is the plural of cirrus?
The plural of cirrus is cirri.
Is cirrus countable?
Cirrus is a countable noun.

Source and license

Adapted from Wiktionary: cirrus (page history and authors) and the entries of its forms. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws left out forms marked obsolete, archaic, rare or dialectal and added the examples. Wiktionary data of 2026-09-02.

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Cite this page: “Plural of cirrus.” Word.ws, https://word.ws/plural/cirrus. Based on Wiktionary, CC BY-SA 4.0.