adjective Anatomy.
of or pertaining to the cheek.
pertaining to the sides of the mouth or to the mouth; oral.
Dentistry. directed toward the cheek. Compare distal ( def 2 ), mesial ( def 2 ).

1825–35; (< F) < Latin bucc(a) (see bucco-) + -al1

buccally, adverb
postbuccal, adjective
prebuccal, adjective
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World English Dictionary
buccal (ˈbʌkəl)
1.  of or relating to the cheek
2.  of or relating to the mouth; oral: buccal lesion
[C19: from Latin bucca cheek]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

"pertaining to the cheek," 1831, from L. bucca "cheek," especially when puffed out (later "mouth").
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

buccal buc·cal (bŭk'əl)

  1. Of, relating to, adjacent to, or in the direction of the cheek.

  2. Of or relating to the mouth cavity.

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
Buccal swab kit, instructions, and a self-addressed envelope in which to return your cheek swab sample.
Along its line of attachment to the buccal epithelium is a shallow groove, the dental furrow.
The buccal cavity of the electric eel may breathe air.
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