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)
ostium uteri externum子宫颈外口
osteoplastic spreader骨科延长器
ostium uteri internum输卵管腹腔口
ostium sinoauriculare窦耳孔
Osteocheilus hasseltin.哈赛尔特骨唇鱼(鲤科)
Osteoarticular trauma骨关节创伤
Osteoblast transplant成骨细胞移植
Osteoclasis of fibula腓骨折骨术
Osteoclasts/am eff破骨细胞/针灸效应
Osteotomy of vertebra脊椎切骨术