Defn: 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.)
Defn: The external male organ of trematodes and some other worms, and of certain Mollusca.
4. (Meteor.)
Defn: See under Cloud.
CIRSOCELE
Cir"so*cele, n. Etym: [Gr. (Med.)
Defn: The varicose dilatation of the spermatic vein.
CIRSOID
Cir"soid, a. Etym: [Gr. -oid.] (Med.)