They turn red litmus paper blue Crossword Clue
5 letters · New York Times · Sunday, December 14, 2025 · 41-Across
Appeared in 1 New York Times Crossword: Sunday, December 14, 2025.
Exact puzzle match · New York Times · December 14, 2025 · 41-Across · 5 letters
BASES0 of 5 letters revealed
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What does this clue mean?
any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water; "bases include oxides and hydroxides of metals and ammonia"
noun
WordNet® (Princeton University)
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