OS

abbr 缩写 = 1 ordinary seaman. 2 (Brit) Ordnance Survey: an OS map 英国全国地形测量局绘制的地图. 3 (esp on clothing, etc) outsize （尤指衣物等上之标志）超大号.

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