monorhinic

mon·o·rhin·ic

(mon'ō-rin'ik),
Single-nosed; used to characterize conjoined twins in which only a single nose cavity is evident.
[mono- + G. rhis (rhin-), nose]

monorhinic

(mŏn″ō-rĭn′ĭk) [″ + rhis, nose]
1. Having a single nose, as in conjoined twins.
2. Having a single fused nasal cavity.