allogenic

allo- +‎ -genic

IPA^(key): /ˌæləˈd͡ʒɛnɪk/

allogenic (comparative more allogenic, superlative most allogenic)

1. Having an external cause, or source; exogenous.
2. (geology) Formed in another location and transported.
3. (medicine, biology, genetics, immunology) Alternative form of allogeneic: genetically distinct, but of the same species; nonself but intraspecies.

Do not confuse allogenic ("of nonself intraspecies origin") with allergenic ("generating allergy"); the two concepts are often related (because allergic reactions can potentially be caused by any antigen and usually/especially by nonself antigens), but the similar sound of the two words is due only to partial cognation of the word roots.

• collegian