meatus

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me·a·tus

 (mē-ā′təs)
n. pl. me·a·tus·es or meatus
A body opening or passage, such as the opening of the ear or the urethral canal.

[Latin meātus, passage, from past participle of meāre, to pass; see mei- in Indo-European roots.]

me·a′tal (-təl) adj.

meatus

(mɪˈeɪtəs)
n, pl -tuses or -tus
(Anatomy) anatomy a natural opening or channel, such as the canal leading from the outer ear to the eardrum
[C17: from Latin: passage, from meāre to pass]

me•a•tus

(miˈeɪ təs)

n., pl. -tus•es, -tus.
an opening, esp. in a bone or bony structure, as the ear or nose.
[1655–65; < Latin meātus course, channel]
me•a′tal, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.meatus - a natural body passagewaymeatus - a natural body passageway    
passageway, passage - a path or channel or duct through or along which something may pass; "the nasal passages"
acoustic meatus, auditory canal, auditory meatus, ear canal, external auditory canal - either of the passages in the outer ear from the auricle to the tympanic membrane
nasal meatus - the passages in the nasal cavity formed by the projections of the nasal conchae
Translations

me·a·tus

n. meato, pasaje, abertura, apertura.

meatus

n (pl meatus) meato
References in classic literature ?
While the ear of the former has an external opening, that of the latter is entirely and evenly covered over with a membrane, so as to be quite imperceptible from without.
Like many of the man-made caves of Pellucidar, this one consisted of three chambers, one behind another, and all unlit except for what sunlight filtered in through the external opening.
1,2) A complete fistula with both an internal and an external opening is thought to be extremely rare, with only a few reported cases in literature.
Hydrogen peroxide mixed with normal saline was injected into the fistula tract through the external opening using the 8 Fr nasogastric (NG) tube to identify internal opening.
Physical examination remains the mainstay of its diagnosis by observation of the entire perineum, looking for an external opening that appears as an open sinus or elevation of granulation tissue.
The inner ostium was identified following the injection of hydrogen-peroxide into the external opening of the fistula.
We decided upon this approach, as it was felt that the external opening of the tract was quite posterior, even for a patient placed in an extra-high dorsal lithotomy position.
In the rest of the cases the tract was identified from the external opening and followed toward the internal opening.
One species of mole rat has no external opening for eyes, but they have small eyes hidden beneath their skin.
Fistula in ano rarely presents with an external opening in the scrotum.
On close examination it was found that discharges was oozing out through an external opening on skin of inter digital space.
The external opening is usually easy to identify and gentle pressure around the lesion will often produce a bead of pus.