DELETERIOUS Meaning of DELETERIOUS in English transcription, транскрипция: [ ˌdelɪˈtɪərɪəs ]adj. harmful (to the mind or body). øødeleteriously adv. [med.L deleterius f. Gk deleterios noxious] English main colloquial, spoken dictionary. Английский основной разговорный словарь. 2012