adenoids

n. growth of lymphoid tissue located in the upper pharynx

Adenoids (or pharyngeal tonsils, or nasopharyngeal tonsils) are a mass of lymphoid tissue situated at the very back of the nose, in the roof of the nasopharynx, where the nose blends into the mouth. Normally, in children, they make a soft mound in the roof and posterior wall of the nasopharynx, just above and behind the uvula.
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Adenoids Common name for the pharyngeal tonsils, which are lymph masses in the wall of the air passageway just behind the nose. [more]Adenoids - Community and Resources

Noun
1. 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"
(synonym) pharyngeal tonsil, Luschka's tonsil, third tonsil, tonsilla pharyngealis, tonsilla adenoidea
(hypernym) lymphatic tissue, lymphoid tissue
(part-holonym) throat, pharynx
Adjective
1. relating to or resembling lymphatic glands or lymphoid tissue
(pertainym) pharyngeal tonsil, Luschka's tonsil, third tonsil, tonsilla pharyngealis, tonsilla adenoidea

plural noun
condition where growths form on the glands at the back of the throat where the passages from the nose join the throat, which prevent the patient breathing through the nose
enlargement of the adenoids or adenoid vegetation = condition in children where the adenoidal tissue is covered with growths and can block the nasal passages or the Eustachian tubes; removal of the adenoids is sometimes indicated

These celebrated structures in the back of the throat are composed of tissue similar to the lymph nodes or "glands."