differentia [ˌdɪfəˈrɛnʃɪə] (pl. differentiae -ʃɪiː)
a distinguishing mark or characteristic 区别标记;区别特征 ■(chiefly Philosophy)an attribute that distinguishes a species of thing from other species of the same genus (主哲)种差
语源
late 17th cent.: from Latin, literally difference', from different- 'carrying away' (see different)