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1. In taxonomy, having the status of a distinct species, genetically distinct and unable to interbreed with other similar species.

2. In immunology, a shorthand term for ‘allelle-specific’ and thus antigenically distinct. Individuals, unless genetically identical, are allospecific and an immune response to the alloantigens (allotypic determinants) will lead to graft rejection.

Subjects: Medicine and Health.

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