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