osteo-arthritis

n [U] (medical 医) painful disease of the joints of the body that causes inflammation and stiffness 骨关节炎.

oscillate, oscillation, oscillator, oscillograph, oscilloscope, osier, osmosis, osmotic, osprey, osseous, ossification, ossified, ossify, ossilate, oste(o)-, ostensible, ostensibly, ostentation, ostentatious, ostentatiously, osteopath, osteopathy, ostler, ostracism, ostracize, ostracize, ostracise, ostrich, OT, other, other from, other than, other-directed, other-worldly, others, otherwise, otiose, otter, ottoman, OU, oubliette,