Enter a clue or pattern or both:
The Clue
Reverse transcriptase is found in it (10 letter answer)
The Answer
RETROVIRUS
Tags
Notes
The answer RETROVIRUS is so rare that it appears less than once every 2500 puzzles.
Definition
RETROVIRUS as a noun:
1. any of a group of viruses that contain two single-strand linear RNA molecules per virion and reverse transcriptase (RNA to DNA)