Dictionary

cirrus

noun cir·rus \ˈsir-əs\

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

plural cir·ri \ˈsir-ˌī\

Full Definition of CIRRUS

1
:  tendril
2
:  a slender usually flexible animal appendage or projection: 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
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Origin of CIRRUS

New Latin, from Latin, curl
First Known Use: 1708

Rhymes with CIRRUS

CIRRUS Defined for Kids

cirrus

noun cir·rus \ˈsir-əs\
plural cir·ri \ˈsir-ī\

Definition of CIRRUS for Kids

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

cirrus

noun cir·rus \ˈsir-əs\
plural cir·ri \ˈsi(ə)r-ˌī\

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

Illustration of CIRRUS

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