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]

The Collaborative International Dictionary of English v.0.48:

Cammock \Cam"mock\, n. [AS. cammoc.] (Bot.)
   A plant having long hard, crooked roots, the Ononis
   spinosa; -- called also rest-harrow. The Scandix
   Pecten-Veneris is also called cammock.
   [1913 Webster] Camomile

WordNet (r) 3.0 (2006):

Ononis spinosa
    n 1: Eurasian plant having loose racemes of pink or purple
         flowers and spiny stems and tough roots [syn: restharrow,
         rest-harrow, Ononis spinosa]