monoousian

from The Collaborative International Dictionary of English v.0.48

Monoousian \Mon`o*ou"si*an\, Monoousious \Mon`o*ou"si*ous\, a.
   [Mono- + Gr. ? being, substance, essence.] (Theil.)
   Having but one and the same nature or essence.
   [1913 Webster]