isograft

synonym: syngraft
https://doi.org/10.1351/goldbook.13345
Tissue transplanted (see graft) between two genetically identical individuals.
Source:
PAC, 2012, 84, 1113. (IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)) on page 1196 [Terms] [Paper]