1A large bird of prey, usually identified as the bearded vulture (or lammergeier), Gypaetus barbatus, or the osprey, Pandion haliaetus; = ossifrage . Now chiefly historical.
2A bird or mammal that feeds on bones; (in early use) specifically †the southern giant petrel, Macronectes giganteus (obsolete).
3A person who or thing which breaks bones, or is capable of breaking bones.
Late 16th century; earliest use found in John Florio (1553–1625), author and teacher of languages. From bone + breaker.