cho·a·na 'kō-ə-nə n, pl -nae -.nē either of the pair of posterior apertures of the nasal cavity that open into the nasopharynx called also posterior naris
cho·a·nal -nəl adj
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n. (pl. choanae)
a funnel-shaped opening, particularly either of the two openings between the nasal cavity and the pharynx.
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cho·a·na (koґə-nə) pl. choґanae [L., from Gr. choanē funnel] infundibulum. [TA] one of the pair of openings between the nasal cavity and the nasopharynx; called also posterior nasal aperture.Medical dictionary. 2011.