(n)(genetics) either of a pair (or series) of alternative forms of a gene that can occupy the same locus on a particular chromosome and that control the same character, Syn.allelomorph
The Collaborative International Dictionary of English (GCIDE) v.0.53Collaborative International Dictionary (GCIDE)
n. 1.11. one of two or more alternative forms of a gene that can have the same place on homologous chromosomes and are responsible for alternative traits. Syn. -- allelomorph [ WordNet 1.5 ]
2. either of a pair of Mendelian characters that may occur in an organism as a consequence of variation at one gene locus. [ PJC ]