The Collaborative International Dictionary of English v.0.48:
Ventricular \Ven*tric"u*lar\, a. [Cf. F. ventriculaire.] Of or pertaining to a ventricle; bellied. [1913 Webster]WordNet (r) 3.0 (2006):
ventricular adj 1: of or relating to a ventricle (of the heart or brain)