O/C oestrogen:creatinine ratio 雌(甾)激素与肌酸酐比率

O2 Oxygen 氧

O3 Ozone 臭氧

OA Osteoarthritis 骨关节炎

OAD Obstructive Airway Disease 呼吸道阻塞疾病

OAE ohr-Augen-Ebene (德)耳眼平面

OAF Osteoclast Activating Factor 破骨细胞激活因子

oag open angle glaucoma 开角型青光眼

OAP Osteoarthropathy 骨关节病

oar other administrative reasons 其它给药原因

oas overall survival 总存活数,总生存数

oat ornithine aminotransferase 鸟氨酸转氨酶

OAV oculoauriculovertebral(dysplasia) 眼耳脊椎的(发育不良)

OB occult blood test 大便隐血试验

OB. obstetrics 产科学

OBA Oxygen Breathing Apparatus 氧气呼吸器

OBD Organic Brain Disease 器质性脑疾患

obe out-of-body experience 体外试验

OBF organ blood flow 器官血流(量)

OBJ Objective 客观的,(接)物镜