ventricose

{ } a. [ NL. ventricosus, fr. L. venter belly. ] (Nat. Hist.) Swelling out on one side or unequally; bellied; ventricular; as, a ventricose corolla. [ 1913 Webster ]

Ventricose shell. (Zool.) (a) A spiral shell having the body whorls rounded or swollen in the middle. (b) A bivalve shell in which the valves are strongly convex. [ 1913 Webster ]