/ ˈædənɔɪdz; NAmE / noun
[ pl. ] pieces of soft tissue at the back of the nose and throat, that are part of the body's immune system and that can swell up and cause breathing difficulties, especially in children
► ad·en·oid·al / ˌædəˈnɔɪdl; NAmE / adjective
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WORD ORIGIN
late 19th cent.: adenoid from Greek adēn gland + -oid .