cirrus

noun
cir·​rus | \ ˈsir-əs How to pronounce cirrus (audio) \
plural cirri\ ˈsir-​ˌī How to pronounce cirri (audio) \

Definition of cirrus

2 : a slender usually flexible animal appendage or projection: such as
a : an arm of a barnacle
b : a filament of a crinoid
c : a fused group of cilia functioning like a limb on some protozoans
d : the male copulatory organ of various invertebrate animals
3 : a high wispy white cloud usually of minute ice crystals formed at altitudes between about 20,000 and 40,000 feet (6,000 and 12,000 meters) — see cloud illustration

Examples of cirrus in a Sentence

Recent Examples on the Web But detailed observers will notice some cirrus on the southeast horizon and -- believe it or not -- this is actually the outer cloud bands of Hurricane Dorian. Sarah Brookbank, Cincinnati.com, "We can see the outer cloud bands of Hurricane Dorian in Greater Cincinnati," 5 Sep. 2019 Some of the cirrus clouds on the southeast horizon are the outer cloud bands from Dorian, according to the National Weather Service. Sarah Brookbank, Cincinnati.com, "We can see the outer cloud bands of Hurricane Dorian in Greater Cincinnati," 5 Sep. 2019 First, physicists came to grips with high clouds—the icy, wispy ones like cirrus clouds that are miles high. Natalie Wolchover, WIRED, "As the World Warms, Clouds Could Disappear—Catastrophically," 3 Mar. 2019 High clouds are classified as either cirrus, cirrostratus, or cirrocumulus. Catherine Zuckerman, National Geographic, "Clouds, explained," 24 Apr. 2019 The alto cirrus indicate a change in weather, the mare’s tail mean high-altitude winds, the cumulus means building moisture. Tom Stienstra, San Francisco Chronicle, "Nature’s fortune-tellers predicted wild weather for Memorial Day weekend," 28 May 2018 There were just a few wispy cirrus clouds in the bright blue sky, but that was enough to spark a fire rainbow. Caitlin O'kane, CBS News, ""Fire rainbow" spotted in Vermont – what is this colorful phenomenon?," 11 June 2018 At sunset, a mix of alto cirrus with mare�s tails and cumulus provide a backdrop to pristine Forester Lake at 10, 240 feet, nestled in the Great Western Divide. Tom Stienstra, San Francisco Chronicle, "Nature’s fortune-tellers predicted wild weather for Memorial Day weekend," 28 May 2018 Dense forest had suddenly given way to a lake flanked by mountains — a Chia pet landscape of undulating greenery beneath a vivid blue sky streaked with cirrus clouds. Jada Yuan, New York Times, "Place 11 of 52: In Chile, a Gorgeous, Very Rainy and Sometimes Lonely Journey," 8 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cirrus.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of cirrus

1708, in the meaning defined at sense 1

History and Etymology for cirrus

New Latin, from Latin, curl

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Statistics for cirrus

Last Updated

27 Sep 2019

Time Traveler for cirrus

The first known use of cirrus was in 1708

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More Definitions for cirrus

cirrus

noun
How to pronounce cirrus (audio)

English Language Learners Definition of cirrus

technical : a thin type of cloud that forms high in the sky

cirrus

noun
cir·​rus | \ ˈsir-əs How to pronounce cirrus (audio) \
plural cirri\ ˈsir-​ī \

Kids Definition of cirrus

: a thin white cloud of tiny ice crystals that forms at a very high altitude

cirrus

noun
cir·​rus | \ ˈsir-əs How to pronounce cirrus (audio) \
plural cirri\ ˈsi(ə)r-​ˌī How to pronounce cirri (audio) \

Medical Definition of cirrus

: a slender usually flexible animal appendage: as
a : a fused group of cilia functioning like a limb on some protozoans
b : the male copulatory organ of some worms

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More from Merriam-Webster on cirrus

Rhyming Dictionary: Words that rhyme with cirrus

Spanish Central: Translation of cirrus

Nglish: Translation of cirrus for Spanish Speakers

Comments on cirrus

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