Originating from a different individual of the same species, especially used in medicine to describe tissue or cells from another person.
From Greek 'allo-' (other) and 'geneic' (relating to generation or origin). The term emerged in medical and biological contexts in the 20th century to distinguish between self-derived and other-derived biological materials.
This word is crucial in organ transplantation—your allogeneic heart transplant comes from another human, which is why your body's immune system might reject it unless doctors carefully manage the mismatch. It's the opposite of 'autologous,' where doctors use your own cells, which your body naturally accepts.
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