A mass of lymphoid tissue found on the posterior wall and roof of the nasopharynx, which may undergo hypertrophy (especially in children), giving rise to adenoids.
Origin
1920s.
Definition of nasopharyngeal tonsil in US English:
nasopharyngeal tonsil
noun
Anatomy
A mass of lymphoid tissue found on the posterior wall and roof of the nasopharynx, which may undergo hypertrophy (especially in children), giving rise to adenoids.