syngeneic
adjective
syn·ge·ne·ic ˌsin-jə-ˈnē-ik 
: involving, derived from, or being genetically identical or similar individuals of the same species especially with respect to antigenic interaction
syngeneic tumor cells
grafts between syngeneic mice
compare allogeneic 
Word History
Etymology
probably from syn- + -geneic (in allogeneic)
Note: See note at allogeneic.
First Known Use
1961, in the meaning defined above
Medical Definition
syngeneic
adjective
syn·ge·ne·ic ˌsin-jə-ˈnē-ik
: genetically identical especially with respect to antigens or immunological reactions
syngeneic tumor cells
grafts between syngeneic mice
compare allogeneic, xenogeneic