This clue appeared in the NYT Crossword on Sunday, April 26, 2026 (47 Across). The answer is hidden below until you want it. Sunday puzzles are large (21 by 21) and themed, about as hard as a Wednesday or Thursday.
Answer length: 4 squares
First letter
A _ _ _
First and last letters
A _ _ D
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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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