third tonsil

Noun

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

Related words

• Synonyms: 
  pharyngeal tonsil , adenoid , Luschka's tonsil , tonsilla pharyngealis , tonsilla adenoidea