orthopaedics (also orthopedics)

n [sing v] (medical 医) (branch of surgery that deals with) correction of bone deformities and diseases 矫形（外科学）: [attrib 作定语] the orthopaedics department in the hospital 医院中的矫形外科.

ornate, ornately, ornateness, ornithological, ornithologist, ornithology, orotund, orphan, orphanage, orris-root, orth(o)-, orthodontic, orthodontics, orthodontist, orthodox, orthodoxy, orthographic (also orthographical), orthographically, orthography, orthopaedic (also orthopedic), orthopaedist (also orthopedist), ortolan, oryx, OS, Oscar, oscillate, oscillation, oscillator, oscillograph, oscilloscope, osier, osmosis, osmotic, osprey, osseous, ossification, ossified, ossify, ossilate, oste(o)-,