The Collaborative International Dictionary of English v.0.48:
Ossiferous \Os*sif"er*ous\, a. [L. os, ossis, a bone + -ferous: cf. F. ossif[`e]re.] Containing or yielding bone. [1913 Webster]WordNet (r) 3.0 (2006):
ossiferous adj 1: containing bones (especially fossil bones); "ossiferous caves"