Etymology
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buccal (adj.)

"pertaining to the cheek," 1813, from Latin bucca "cheek," especially when puffed out (later "mouth"); see bouche.

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Definitions of buccal

buccal (adj.)
of or relating to or toward the cheek;
the buccal aspect of the gum
buccal (adj.)
of or involving the mouth or mouth region or the surface on which the mouth is located;
a buccal gland
Synonyms: oral
From wordnet.princeton.edu