Open English Wordnet
Nouns
(n)form, variant, strain, var.(biology) a group of organisms within a species that differ in trivial ways from similar groups“a new strain of microorganisms” (n)version, variant, variation, editionsomething 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” Adjectives
(s)variantdiffering from a norm or standard“a variant spelling” (s)variantexhibiting variation and change“letters variant in size”