Are yams and sweet potatoes the same?
late 14c., from Old French variant, from Latin variantem (nominative varians), present participle of variare "to change" (see vary).
1848, from variant (adj.).
variant var·i·ant (vâr'ē-ənt, vār'-)adj.
Having or exhibiting variation; differing.
Tending or liable to vary; variable.
Deviating from a standard, usually by only a slight difference.