heteroantigen
noun
het·ero·an·ti·gen
-ˈant-i-jən, -ˌjen 
: an antibody that is produced by an individual of one species and is capable of stimulating an immune response in an individual of another species
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“Heteroantigen.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/heteroantigen. Accessed 6 Dec. 2025.
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