The meaning of EUSTACHIAN is of or relating to Eustachio or to the eustachian tube : located in or adjoining the eustachian tube.

Eustachian tube definition: 1. either of the two passages, located between the middle ear and the back of the nose, that open…. Learn more.

Eustachian, meaning "discovered by, described by or attributed to Eustachi" (Latin name Eustachius) may refer to: Anatomy.

Eustachian tube definition: a canal extending from the middle ear to the pharynx; auditory canal.. See examples of EUSTACHIAN TUBE used in a sentence.

The Eustachian tube also called the auditory tube or pharyngotympanic tube, is a tube that links the nasopharynx to the middle ear, of which it is also a ...

Of or relating to Bartolomeo Eustachi (1500 or 1514–1574), also known as Eustachius, one of the founders of the science of human anatomy.

either of the paired tubes connecting the middle ears to the nasopharynx; equalizes air pressure on the two sides of the eardrum. synonyms: auditory tube.

a slender tube between the middle ear and the pharynx, which serves to equalize air pressure on both sides of the eardrum.

There is one meaning in OED's entry for the adjective Eustachian. See 'Meaning & use' for definition, usage, and quotation evidence.