Crossword Genius

Boric ____ (4)

Ross

I believe the answer is:

acid

(Other definitions for acid that I've seen before include "Battery fluid" , "Etcher's fluid" , "Caustic and biting" , "Substance with pH of less than 7" , "bad rain" .)

I've seen this clue in The Star Tribune and the Penny Press.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.