(n) a variant phonological representation of a morpheme, Example:the final sounds of `bets' and `beds' and `horses' and `oxen' are allomorphs of the English plural morpheme
n. [ Gr. &unr_; other + morfh` form. ] (Min.) (a) Any one of two or more distinct crystalline forms of the same substance; or the substance having such forms; -- as, carbonate of lime occurs in the allomorphs calcite and aragonite. (b) A variety of pseudomorph which has undergone partial or complete change or substitution of material; -- thus limonite is frequently an allomorph after pyrite. G. H. Williams. [ 1913 Webster ]