Ostan纯氢氧化钠
OSTabbr.科学与技术处(=office of science and technology)abbr.作战适用性试验(=operational suitability testing)
Ostericum scaberulumn.疏毛山芹
Ostreobium quekettiin.嚎壳藻
Ostwald color circle奥斯瓦德颜色圈
ostraceous psoriasis蛎壳状牛皮癣
osteoprogenitor cell前生骨细胞, 骨祖细胞
Osteoplasty of femur股骨成形术
osteoma sarcomatosum[医] 骨肉瘤