Variant

Varying in from, character, or the like; variable; different; diverse.

Changeable; changing; fickle.

Something which differs in form from another thing, though really the same; as, a variant from a type in natural history; a variant of a story or a word.

a variable quantity that is random

(biology) a group of organisms within a species that differ in trivial ways from similar groups; "a new strain of microorganisms"

exhibiting variation and change; "letters variant in size"

something a little different from others of the same type; "an experimental version of the night fighter"; "a variant of the same word"; "an emery wheel is the modern variation of a grindstone"; "the boy is a younger edition of his father"