variant
/ˈveərɪənt/noun
- a form or version of something that differs in some respect from other forms of the same thing or from a standard变体; 变异; 异文：
clinically distinct variants of malaria
疟疾的不同临床变异
as modifier a variant spelling.异体拼写。
词源
late Middle English （as an adjective in the sense 'tending to vary'）： from Old French, literally 'varying', present participle of varier （see VARY）. The noun dates from the mid 19th cent.