DIAPHYSIS Meaning of DIAPHYSIS in English [ dʌɪ'afɪsɪs ]■ noun ( plural diaphyses -si:z ) Anatomy the shaft or central part of a long bone. Compare with epiphysis .OriginC19: from Gk diaphusis 'growing through'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004