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cir·ri

Audio Help [sir-ahy] Pronunciation Key

–noun Botany, Zoology.

a pl. of cirrus.

Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

Encyclopædia Britannica, Inc.
Cirri

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Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This

cir·rus

Audio Help [sir-uh

s] Pronunciation Key

–noun, plural cir·rus for 1, cir·ri

Audio Help [sir-ahy] Pronunciation Key for 2, 3.

Meteorology.

a.	a cloud of a class characterized by thin white filaments or narrow bands and a composition of ice crystals: of high altitude, ab. 20,000–40,000 ft. (6000–12,000 m).

b.	a cirriform cloud.

2.	Botany. a tendril.

Zoology.

a.	a filament or slender appendage serving as a foot, tentacle, barbel, etc.

b.	the male copulatory organ of flatworms and various other invertebrates.

[Origin: 1700–10; < L: a curl, tuft, plant filament like a tuft of hair

]

Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

American Heritage Dictionary - Cite This Source - Share This

cir·ri Audio Help (sîr'ī') Pronunciation Key
n. Plural of cirrus.

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

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cir·rus Audio Help (sîr'əs) Pronunciation Key
n. pl. cir·ri (sîr'ī')

A high-altitude cloud composed of narrow bands or patches of thin, generally white, fleecy parts.
Biology
1. A tendril or similar part.
2. A slender flexible appendage, such as the fused cilia of certain protozoans.

[Latin, curl of hair.]

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The American Heritage Science Dictionary - Cite This Source - Share This

cirrus Audio Help (sîr'əs) Pronunciation Key
Plural cirri (sîr'ī')
A high-altitude cloud composed of feathery white patches or bands of ice crystals. Cirrus clouds generally form between 6,100 and 12,200 m (20,000 and 40,000 ft). See illustration at cloud.