1. Either of the two openings in the nasal cavity that lead from the nasopharynx to the back of the throat.
Usage: anatomy; usually used in plural form 'choanae'

Examples

• The choana is the posterior opening of the nasal passage.
• Air flows through the choana into the nasopharynx during breathing.
• In anatomy class, students learned about the location of the choanae in the skull.
• The choanae connect the nasal cavity to the pharynx.
• Obstruction of the choana can affect normal nasal airflow.