refers to a graft or transfer (e.g., of tissue) from a genetically non-identical individual. Contrast with syngenic.

Taken from different individuals of the same species. Also called allogeneic.

In transplantation biology, denoting individuals (or tissues) that are of the same species but antigenically distinct.

Involving, derived from, or being individuals of the same species that are sufficiently unlike genetically to interact antigenically.

Allos, Greek = other, different. In this context, transfer of the bone marrow from another person. A precondition for this is that the tissue characteristics of donor and recipient are largely identical.