onocerin

from The Collaborative International Dictionary of English v.0.48

Onocerin \On`o*ce"rin\, n. [NL. Ononis, the generic name of the
   plant + L. cera wax.] (Chem.)
   A white crystalline waxy substance extracted from the root of
   the leguminous plant {Ononis spinosa}.
   [1913 Webster]