CIRRI

CIRRUS

cirrus

(noun) a slender flexible animal appendage as on barnacles or crinoids or many insects; often tactile

cirrus, cirrus cloud

(noun) a wispy white cloud (usually of fine ice crystals) at a high altitude (4 to 8 miles)

cirrus, cirrhus

(noun) usually coiled

Source: WordNet® 3.1

---

Noun

cirri

(botany) plural of cirrus Tendrils or claspers.

(zoology) plural of cirrus Grouped cilia that function as "legs" in certain species of protists.

Source: Wiktionary

---

Cir"ri, n. pl.

Definition: See Cirrus.

CIRRUS

Cir"rus, n.; pl. Cirri. Etym: [L., lock, curl, ringlet.] [Also written cirrhus.]

1. (Bot.)

Definition: A tendril or clasper.

2. (Zoöl.) (a) A soft tactile appendage of the mantle of many Mollusca, and of the parapodia of Annelida. Those near the head of annelids are Tentacular cirri; those of the last segment are caudal cirri. (b) The jointed, leglike organs of Cirripedia. See Annelida, and Polychæta.

Note: In some of the inferior animals the cirri aid in locomotion; in others they are used in feeding; in the Annelida they are mostly organs of touch. Some cirri are branchial in function.

3. (Zoöl.)

Definition: The external male organ of trematodes and some other worms, and of certain Mollusca.

4. (Meteor.)

Definition: See under Cloud.

Source: Webster’s Unabridged Dictionary 1913 Edition

---