Enter a clue or pattern or both:
The Clue
Microscopic organism (10 letter answer)
The Answer
ANIMALCULE
Tags
Notes
The answer ANIMALCULE is so rare that it appears less than once every 2500 puzzles.
Definition
ANIMALCULE as a noun:
1. (animalcule, animalculum) = microscopic organism such as an amoeba or paramecium