meatus(redirected from external opening)
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n. pl. me·a·tus·es or meatus
A body opening or passage, such as the opening of the ear or the urethral canal.
me·a′tal (-təl) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||meatus - 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
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