| pharyngeal tonsil | (n) a collection of lymphatic tissue in the throat behind the uvula (on the posterior wall and roof of the nasopharynx), Syn. Luschka's tonsil, tonsilla adenoidea, tonsilla pharyngealis, adenoid, third tonsil, Example: hypertrophy of the pharyngeal tonsils is called adenoids; enlarged adenoids may restrict the breathing of children |