The Clue
One kind of test (4 letter answer)
The Answer
ACID
Tags
Notes
The answer ACID is seen frequently, appearing about once every 70 puzzles.
Related Clues
Amino ___
Biting
The "A" in DNA
Lsd
Mordant
Nasty
___ rock
Sarcasm
Sharp
Sour
Tart
___ test
Vicious
Vinegar, for one
Vitriolic
Battery contents
Battery fluid
Breakdown cause
Certain test
Etcher's need
Kind of rock
Kind of test
Kind of tongue
Lab liquid
LSD, familiarly
Niacin, e.g.
Part of DNA
Sour substance
Type of rain
It's not basic
Like gastric juice
Like some rain
___ rain (lake pollutant)
Word with test or rain
It has a low pH
What red indicates in litmus tests
Definition
ACID as a noun:
1. any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt
2. (acid, back breaker, battery-acid, dose, dot, Elvis, loony toons, Lucy in the sky with diamonds, pane, superman, window pane, Zen) = street name for lysergic acid diethylamide
ACID as an adjective:
1. (acerb, acerbic, acid, acrid, bitter, blistering, caustic, sulfurous, sulphurous, venomous, virulent, vitriolic) = harsh or corrosive in tone; "an acerbic tone piercing otherwise flowery prose"; "a barrage of acid comments"; "her acrid remarks make her many enemies"; "bitter words"; "blistering criticism"; "caustic jokes about political assassination, talk-show hosts and medical ethics"; "a sulfurous denunciation"; "a vitriolic critique"
2. (acidic, acid, acidulent, acidulous) = being sour to the taste
3. having the characteristics of an acid; "an acid reaction"