(1):
(n.) The external male organ of trematodes and some other worms, and of certain Mollusca.
(2):
(n.) A tendril or clasper.
(3):
(n.) 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.
(4):
(n.) The jointed, leglike organs of Cirripedia. See Annelida, and Polychaeta.
(5):
(n.) See under Cloud.