Enter a clue or pattern or both:
The Clue
Dovelike petrel (5 letter answer)
The Answer
PRION
Tags
Notes
The answer PRION is so rare that it appears less than once every 2500 puzzles.
Definition
PRION as a noun:
1. (microbiology) an infectious protein particle similar to a virus but lacking nucleic acid; thought to be the agent responsible for scrapie and other degenerative diseases of the nervous system