meatus
/mɪˈeɪtəs/noun
(复同单或meatuses)
1- Anatomy a passage or opening leading to the interior of the body【剖】管, 道, 口：
the urethral meatus.
尿道。
1.1
- （亦作external auditory meatus）the passage leading into the ear外耳道。
词源
late Middle English: from Latin, 'passage' from meare 'to flow, run'.