ear canal

名词 ear canal:

1. either of the passages in the outer ear from the auricle to the tympanic membrane
   同义词：auditory meatus, acoustic meatus, auditory canal, external auditory canal

1. The absence or closure of a normal body orifice or tubular passage such as the anus, intestine, or external ear canal.
   (先天性)闭锁，无孔正常的身体孔或管道，如肛门、肠或外耳道的缺失或闭合