noun Botany, Zoology.
noun, plural cir·rus for 1, cir·ri [sir-ahy] /ˈsɪr aɪ/ for 2, 3.
- a cloud of a class characterized by thin white filaments or narrow bands and a composition of ice crystals: of high altitude, about 20,000–40,000 feet (6000–12,000 meters).
- a cirriform cloud.
- a filament or slender appendage serving as a foot, tentacle, barbel, etc.
- the male copulatory organ of flatworms and various other invertebrates.
Origin of cirrus
Examples from the Web for cirri
Historical Examples of cirri
People don't know what Cirri are, at least not one out of fifty readers.The Poet at the Breakfast Table
Oliver Wendell Holmes, Sr.
The cirri not rarely get cut off, but are, as it appears, soon repaired.A Monograph on the Sub-class Cirripedia (Volume 2 of 2)
Some are close-packed and dense, like cumuli; some are wispy or mottled, like cirri.Curiosities of the Sky
In very young specimens, the cirri are only barred with purple.
The pedicels of all the cirri are thickly covered with bristles.
noun plural -ri (-raɪ)
- a slender tentacle or filament in barnacles and other marine invertebrates
- a hairlike structure in other animals, such as a filament on the appendage of an insect or a barbel of a fish
Word Origin for cirrus
1708, "curl-like fringe or tuft," from Latin cirrus "a lock of hair, tendril, curl, ringlet of hair; the fringe of a garment." In meteorology, cirrus clouds attested from 1803. So called from fancied resemblance of shape.