allele

• POS: Noun
• HYPHEN: al=lele

CIDE DICTIONARY

allele, n. 

•  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.  [WordNet 1.5]
•  either of a pair of Mendelian characters that may occur in an organism as a consequence of variation at one gene locus.  [PJC]

OXFORD DICTIONARY

allele, n. (also allel) one of the (usu. two) alternative forms of a gene.

Derivative

allelic adj.

Etymology

G Allel, abbr. of ALLELOMORPH