acoustic meatus

https://doi.org/10.1351/goldbook.10329

Either of two passages in the ear, one leading to the tympanic membrane (external acoustic meatus), and one for passage of nerves and blood vessels (internal acoustic meatus).

Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 716 [Terms] [Paper]