【化】 外径external diameter
鼻背动脉dorsal nasal artery, external nasal artery; 又称“鼻外动脉”。
外标法external standard method
外耳道external auditory
疡科心得集Yangke Xinde Ji; Experience Gained in Treating External Diseases
尿道外口external urethral meatus
脑室外引流（法）external ventricular drainage
体外动静脉短路external arterio-venous shunt