syngenesiotransplantation

noun
syn·​ge·​ne·​sio·​trans·​plan·​ta·​tion | \ ˌsin-jə-ˌnē-zē-ō-ˌtran(t)s-ˌplan-ˈtā-shən How to pronounce syngenesiotransplantation (audio) \

Medical Definition of syngenesiotransplantation

: a graft of material or tissue between closely related individuals of the same species