'Siphonata' definitions:

Definition of 'Siphonata'

From: GCIDE

Siphonata \Si`pho*na"ta\, n. pl. [NL.] (Zool.) A tribe of bivalve mollusks in which the posterior mantle border is prolonged into two tubes or siphons. Called also Siphoniata. See Siphon, 2 (a), and Quahaug. [1913 Webster]