First noble gas to be discovered Crossword Clue
5 letters · New York Times · Tuesday, May 25, 2021 · 3-Down
Appeared in 1 New York Times Crossword: Tuesday, May 25, 2021.
Exact puzzle match · New York Times · May 25, 2021 · 3-Down · 5 letters
ARGON0 of 5 letters revealed
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What does this clue mean?
a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere
noun
WordNet® (Princeton University)
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