1.a. Having two auricles, as the heart of mammals, birds, and reptiles.
Medical Definition of Biauriculate
1.
1. Having two auricles, as the heart of mammals, birds, and reptiles.
2. Having two earlike projections at its base, as a leaf.
Origin: Pref. Bi- + au riculate.
Source: Websters Dictionary
(01 Mar 1998)