cirrus
/ˈsɪɹəs/ noun
Forms cirri
- noun (botany) Synonym of tendril (“a thin, spirally coiling stem that attaches a plant to its support”).
- noun (zoology) 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.
- noun (ornithology, obsolete) A tuft of ornamental feathers.
- noun (ornithology, obsolete) A long, thin, wirelike tail feather.
- noun (meteorology, often attributive) A principal high-level type of cloud, typically composed of thin, delicate, white filaments or wisps, or narrow bands.
Synonyms
Etymology
Learned borrowing from Latin cirrus (“curl; fringe of clothes; mane (especially forelock) of a horse; etc”); further etymology unknown.
Sense 2 (“type of cloud”) was coined by the British chemist and amateur meteorologist Luke Howard (1772–1864): see the 1803 quotation.
The plural form cirri is also a learned borrowing from Latin cirrī, the nominative or vocative plural of cirrus.
Webster’s 1913
- noun A tendril or clasper.
- noun (a) A soft tactile appendage of the mantle of many Mollusca, and of the parapodia of Annelida. Those near the head of annelids are Tentacular cirri; those of the last segment are caudal cirri.
Etymology [L., lock, curl, ringlet.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “cirrus”, CC BY-SA 4.0. Details