variant

nouns

an event that departs from expectations
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(biology) a group of organisms within a species that differ in trivial ways from similar groups
"a new strain of microorganisms"
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"
is derived from

adjectives

differing from a norm or standard
"a variant spelling"
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is similar to
unlike in nature or quality or form or degree
"took different approaches to the problem"; "came to a different conclusion"; "different parts of the country"; "on different sides of the issue"; "this meeting was different from the earlier one"
exhibiting variation and change
"letters variant in size"
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liable to or capable of change
"rainfall in the tropics is notoriously variable"; "variable winds"; "variable expenses"