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Home/USA Today Crossword/Base's chemical opposite

Base's chemical opposite

Nora WhitfieldNora Whitfield Crossword Editor · Verified answers

Looking for the answer to the USA Today Crossword clue “Base's chemical opposite”? The solution is ACID, a 4-letter word. This clue was most recently seen in the October 19, 2026 (Monday) USA Today Crossword. Tap any date below to open that day's complete puzzle, or search another clue from the bar above.

Answer
ACID
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Last appearance

October 19, 2026MondayACID

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