Schiz`o·rhi'nal adjective [ Schizo- + rhinal .] 1. (Anat.) Having the nasal bones separate. 2. (Zoology) Having the anterior nostrils prolonged backward in the form of a slit. 
schizorhinal Said of birds having a single, slit-like, bony nostril opening and in which the anterior border of the nasal bones is deeply cleft.