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1899, from lymph + adenopathy, from comb. form of Greek aden (genitive adenos) "gland" (see inguinal) + -pathy.
lymphadenopathy lym·phad·e·nop·a·thy (lĭm-fād'n-ŏp'ə-thē, lĭm'fə-dn-)n. A chronic, abnormal enlargement of the lymph nodes, usually associated with disease.