noun Date: 1978 a mood disorder having a clinical course involving one or more episodes of serious psychological depression lasting two or more weeks each with no intervening episodes of mania
MAJOR DEPRESSIVE DISORDER
Meaning of MAJOR DEPRESSIVE DISORDER in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012