derivative /di'nvativ; da'nvativ/ adj, n [C] (thing, word, substance) derived from another; not original or primitive: 由他物而來的 (物件，物質(zhì)); 由他字而來的 (字); 非本來的; 非原始的; 轉(zhuǎn)來的; 衍生物; 轉(zhuǎn)化字; 引申字： 'Assertion' is a ~ of assert'. assertion 一字由 assert 轉(zhuǎn)化而來。