third tonsil

noun

1. a collection of lymphatic tissue in the throat behind the uvula (on the posterior wall and roof of the nasopharynx)
   1. hypertrophy of the pharyngeal tonsils is called adenoids
   2. enlarged adenoids may restrict the breathing of children

   Synonym:    pharyngeal tonsiladenoidLuschka's tonsiltonsilla pharyngealistonsilla adenoidea