Physicist Ernst who studied shock waves Crossword Clue
4 letters · New York Times · Friday, March 16, 2012 · 53-Down
Appeared in 1 New York Times Crossword: Friday, March 16, 2012.
Exact puzzle match · New York Times · March 16, 2012 · 53-Down · 4 letters
MACH0 of 4 letters revealed
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What does this clue mean?
Austrian physicist and philosopher who introduced the Mach number and who founded logical positivism (1838-1916)
noun
WordNet® (Princeton University)
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