adenoid

nouns

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"
Luschka's tonsil, adenoid, pharyngeal tonsil, third tonsil, tonsilla adenoidea, tonsilla pharyngealis
is derived from
adenoidal

adjectives

relating to or resembling lymphatic glands or lymphoid tissue
adenoid