This clue appeared in the NYT Crossword on Monday, July 27, 2026 (54 Down). The answer is hidden below until you want it. Monday puzzles are the easiest of the week, so the clue is likely a plain definition.
Answer length: 4 squares
First letter
A _ _ _
First and last letters
A _ _ D
Show the answer
About the answer
ACID as a word: (chemistry) Any compound which yields H+ ions (protons) when dissolved in water; an Arrhenius acid; (chemistry) Any compound that easily donates protons to a base; a Brønsted acid.
ACID has been an answer 6 times in the NYT Crossword and Mini since January 30, 2026.
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