Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of abranchiata is as below...

Tetrabranchiate :: Tetrabranchiate (n.) One of the Tetrabranchiata.

Tetrabranchiate :: Tetrabranchiate (a.) Of or pertaining to the Tetrabranchiata.

Nautilus :: Nautilus (n.) The only existing genus of tetrabranchiate cephalopods. About four species are found living in the tropical Pacific, but many other species are found fossil. The shell is spiral, symmetrical, and chambered, or divided into several cavities by simple curved partitions, which are traversed and connected together by a continuous and nearly central tube or siphuncle. See Tetrabranchiata..

Tetrabranchiata :: Tetrabranchiata (n. pl.) An order of Cephalopoda having four gills. Among living species it includes only the pearly nautilus. Numerous genera and species are found in the fossil state, such as Ammonites, Baculites, Orthoceras, etc..

Abranchiata :: Abranchiata (n. pl.) A group of annelids, so called because the species composing it have no special organs of respiration..

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