DIAMETRICAL Meaning of DIAMETRICAL in English [ ˌdʌɪə'mɛtrɪk(ə)l ]■ adjective1》 (of opposites) complete; absolute: he's the ~ opposite of Gabriel.2》 of or along a diameter.Derivativesdiametric adjective~ly adverb Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004