Defn: Any cephalopod having a siphonate shell.
SIPHONIFEROUS
Si"phon*if"er*ous, a. Etym: [Siphon + -ferous.] (Zoöl.)
Defn: Siphon-bearing, as the shell of the nautilus and other cephalopods.
SIPHONIUM
Si*pho"ni*um, n.; pl. Siphonia. Etym: [NL., from Gr. Siphon.] (Anat.)
Defn: A bony tube which, in some birds, connects the tympanium with the air chambers of the articular piece of the mandible.
SIPHONOBRANCHIATA
Si`pho*no*bran`chi*a"ta, n. pl. Etym: [NL. See Siphon, and Branchia.]
(Zoöl.)
Defn: A tribe of gastropods having the mantle border, on one or both sides, prolonged in the form of a spout through which water enters the gill cavity. The shell itself is not always siphonostomatous in this group.
SIPHONOBRANCHIATE
Si`pho*no*bran"chi*ate, a. (Zoöl.)
Defn: Having a siphon, or siphons, to convey water to the gills; belonging or pertaining to the Siphonobranchiata. — n.
Defn: One of the Siphonobranchiata.