- osseous
- "bony," 1707, from M.L. ossous, from L. osseus "bony," from os (gen. ossis) "bone," from PIE *os- (cf. Skt. asthi, Hittite hashtai-, Gk. osteon "bone," Gk. ostrakon "oyster shell," Avestan ascu- "shinbone," Welsh asgwrn, Armenian oskr, Albanian asht "bone").