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
Body, coloured yellowish-white, with the upper segments of the pedicels of the cirri, tinted in front with purple.A Monograph on the Sub-class Cirripedia (Volume 1 of 2)|Charles Darwin
The cirri not rarely get cut off, but are, as it appears, soon repaired.
The thorax is laterally compressed, the ventral surface being very narrow, with the bases of the cirri placed closely together.
The third pair have only inverted conical segments, coloured darker purple than the other cirri.
The word is also applied to the Cirri, which protrude from the oral openings of Cirripedes.A Conchological Manual|George Brettingham Sowerby
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.