retrotransposon

noun
ret·ro·trans·po·son | \ -ˌtran(t)s-ˈpō-ˌzän \

Medical Definition of retrotransposon 

: 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

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