meatus acusticus externus

ex·ter·nal a·cous·tic me·a·tus

[TA]

the passage leading inward through the tympanic portion of the temporal bone, from the auricle to the tympanic membrane; it consists of a bony (inner) portion and a fibrocartilaginous (outer) portion, the cartilaginous external acoustic meatus.

Synonym(s): meatus acusticus externus [TA], acoustic meatus (1) , antrum auris, auditory canal, ear canal, external auditory meatus

Farlex Partner Medical Dictionary © Farlex 2012

meatus

(me-a'tus) plural.meatus [L.]

A passageway or an opening. meatal (me-a'tal), adjective

acoustic meatus

The opening to either the external or internal auditory canal. It can also be a synonym for either the external or internal auditory canal.

meatus acusticus externus

External auditory canal.

meatus acusticus internus

Internal auditory canal.

external acoustic meatus

External auditory meatus.

external auditory meatus

The outer opening of the external auditory canal, or the canal itself.

See: external acoustic meatus.

internal acoustic meatus

Internal auditory meatus.

internal auditory meatus

The opening of the internal auditory canal into the cranial cavity located on the posterior surface of the petrous portion of the temporal bone, or the canal itself.

Synonym: internal acoustic meatus

meatus nasi communis

Common nasal cavity on either side of septum, into which three meatus open.

meatus nasi inferior

Space beneath inferior turbinate or concha of the nose.

meatus nasi medius

Space beneath middle turbinate or concha of the nose.

meatus nasi superior

Space beneath superior turbinate or concha of the nose.

meatus nasopharyngeus

Posterior portion of nasal cavity, which communicates with the nasopharynx.

urethral meatus

External opening of the urethra.

Synonym: urinary meatus; meatus urinarius

meatus urinarius

Urethral meatus.

urinary meatus

Urethral meatus.

Medical Dictionary, © 2009 Farlex and Partners