This clue appeared in the NYT Crossword on Sunday, March 1, 2026 (45 Down). 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: 3 squares
First letter
N _ _
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About the answer
NOS as a word: (uncountable) Abbreviation of nitrous oxide (“N₂O”). [(inorganic chemistry) A non-flammable gas (N₂O) commonly used in surgery and dentistry for its anaesthe...; (countable) Acronym of nitrous oxide system.
NOS has been an answer 11 times in the NYT Crossword and Mini since November 2, 2025.
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