Main Entry:

cir·rus

Pronunciation:

\ˈsir-əs\

Function:

noun

Inflected Form(s):

plural cir·ri \ˈsir-ˌī\

Etymology:

New Latin, from Latin, curl

Date:

1708

1: tendril2: a slender usu. 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