Enter a clue or pattern or both:
The Clue
Pool necessity (8 letter answer)
The Answer
CHLORINE
Tags
Notes
The answer CHLORINE is so rare that it appears less than once every 2500 puzzles.
Related Clues
It's added to the pool
Definition
CHLORINE as a noun:
1. (chlorine, Cl, atomic number 17) = a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs naturally only as a salt (as in sea water)