variant

variant (http://definr.com/variant)

     adj : differing from a norm or standard; "a variant spelling"
     n 1: an event that departs from expectations [syn: discrepancy,
           variance]
     2: (biology) a group of organisms within a species that differ
        in trivial ways from similar groups; "a new strain of
        microorganisms" [syn: form, strain, var.]
     3: a variable quantity that is random [syn: random variable,
        variate, stochastic variable, chance variable]
     4: something a little different from others of the same type;
        "an experimental version of the night fighter"; "an emery
        wheel is a modern variant of the grindstone" [syn: version,
         variation]