Definitions for oral cavity
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Princeton's WordNet
mouth, oral cavity, oral fissure, rima oris(noun)
the opening through which food is taken in and vocalizations emerge
"he stuffed his mouth with candy"
Wiktionary
oral cavity(Noun)
mouth
Citation
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"oral cavity." Definitions.net. STANDS4 LLC, 2013. Web. 22 May 2013. <http://www.definitions.net/definition/oral cavity>.

