The Collaborative International Dictionary
Biventral
Biventral \Bi*ven"tral\, a. [Pref. bi- + ventral.] (Anat.) Having two bellies or protuberances; as, a biventral, or digastric, muscle, or the biventral lobe of the cerebellum.
Wiktionary
biventral
a. 1 Having two belly 2 digastric