oral cavity proper

or·al cav·i·ty prop·er

[TA] the space between the dental arches, limited posteriorly by the isthmus of the fauces (palatoglossal arch). Synonym(s): cavitas oris propria [TA]

or·al cav·i·ty prop·er

(ōrăl kavi-tē propĕr) [TA] Space between dental arches, limited posteriorly by isthmus of fauces (palatoglossal arch).