RhymeZone: allotype definitions

Definitions of allotype:

noun: (zoology, taxonomy) A designated paratype of a species (or lower-order taxon) that is the opposite sex of the holotype.
noun: (biochemistry) A genetically determined variant of the amino acid sequence of a protein.
noun: (immunology) An immunoglobulin allotype; the allele of the antibody chains found in an individual.

(Definitions from Wiktionary)