retrotransposon

noun

ret·​ro·​trans·​po·​son -ˌtran(t)s-ˈpō-ˌzän 

: a transposable element that undergoes transposition from one place to another in the genome of a cell by forming an intermediate RNA transcript from which a copy of the DNA of the transposable element is made using a reverse transcriptase and inserted into the genome at a new location

called also retroposon