This genus is remarkable for a membranous bag rising above the occiput, which can be filled with air at pleasure; also for an elevated crest along the back, that can be raised or depressed at will.
3. (Mil.) A large piece of ordnance, so called from its supposed resemblance to the serpent of that name, or from its size. [Obs.]
Ba"sin (&?;), n. [OF. bacin, F. bassin, LL. bacchinus, fr. bacca a water vessel, fr. L. bacca berry, in allusion to the round shape; or perh. fr. Celtic. Cf. Bac.]
1. A hollow vessel or dish, to hold water for washing, and for various other uses.