The Collaborative International Dictionary of English v.0.48:
Claviceps \Claviceps\ n. a genus of fungi parasitic upon the ovaries of various grasses. Syn: genus Claviceps. [WordNet 1.5]WordNet (r) 3.0 (2006):
Claviceps n 1: fungi parasitic upon the ovaries of various grasses [syn: Claviceps, genus Claviceps]