oral fissure

(redirected from oral opening)
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or·al fis·sure

[TA]
the horizontal opening between the lips leading into the oral vestibule; the aperture of the mouth.
Synonym(s): rima oris [TA], oral opening

or·al fis·sure

(ōrăl fishŭr) [TA]
Horizontal opening between the lips leading into oral vestibule; aperture of mouth.
Synonym(s): oral opening.