osseous

adj. 骨的，多骨的

orthodoxy, orthographic (also orthographical), orthographically, orthography, orthopaedic (also orthopedic), orthopaedics (also orthopedics), orthopaedist (also orthopedist), ortolan, oryx, OS, Oscar, oscillate, oscillation, oscillator, oscillograph, oscilloscope, osier, osmosis, osmotic, osprey, ossification, ossified, ossify, ossilate, oste(o)-, ostensible, ostensibly, ostentation, ostentatious, ostentatiously, osteo-arthritis, osteopath, osteopathy, ostler, ostracism, ostracize, ostracize, ostracise, ostrich, OT, other,