meatus

[mee-ey-tuhs]
noun, plural meatuses, meatus. Anatomy.
an opening or foramen, especially in a bone or bony structure, as the opening of the ear or nose.

Origin:
1655–65; < Latin meātus course, channel, equivalent to meā(re) to go, extend, have a course + -tus suffix of v. action

meatal, adjective
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World English Dictionary
meatus (mɪˈeɪtəs)
 
n , pl -tuses, -tus
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]

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American Heritage
Medical Dictionary

meatus me·a·tus (mē-ā'təs)
n. pl. me·a·tus·es or meatus
A body opening or passage, especially the external opening of a canal.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
The external acoustic meatus is developed from the first branchial groove.
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