Defn: A division of Scaphopoda including those in which the foot terminates in a circular disk.
SIPHONOSTOMATA Si`pho*no*stom"a*ta, n. pl. Etym: [NL. See Siphon, and Stoma.] (Zoöl.) (a) A tribe of parasitic copepod Crustacea including a large number of species that are parasites of fishes, as the lerneans. They have a mouth adapted to suck blood. (b) An artificial division of gastropods including those that have siphonostomatous shells.
SIPHONOSTOMATOUS Si`pho*no*stom"a*tous, a. (Zoöl.) (a) Having the front edge of the aperture of the shell prolonged in the shape of a channel for the protection of the siphon; — said of certain gastropods. (b) Pertaining to the Siphonostomata.
SIPHONOSTOME Si`pho*nos"tome, n. Etym: [Gr. (Zoöl.) (a) Any parasitic entomostracan of the tribe Siphonostomata. (b) A siphonostomatous shell.
SIPHORHINAL
Si`pho*rhi"nal, a. Etym: [Siphon + rhinal.] (Zoöl.)
Defn: Having tubular nostrils, as the petrels.
SIPHORHINIAN
Si`pho*rhin"i*an, n. (Zoöl.)
Defn: A siphorhinal bird.
SIPHUNCLE
Si"phun`cle, n. Etym: [L. siphunculus, sipunculus, dim. of sipho. See
Siphon.] (Zoöl.)
Defn: The tube which runs through the partitions of chambered cephalopod shells.