Austrian physicist.
The crossword clue "Austrian physicist." is answered by MACH, a 4-letter entry. Used 8 times across 7 distinct years; most recently in 2013; first recorded in 1964. It appears in 2 publications in the xd corpus. Every figure on this page comes from the collection data itself, never from a guess.
The answer
MACH
4 letters. See every clue for this answer on the MACH answer page.
Used 8 times across 7 distinct years; most recently in 2013; first recorded in 1964. It appears in 2 publications in the xd corpus. Frequency and last-seen figures come from the xd crossword corpus only.
Other answers for this clue
The same clue has also been answered these ways in the xd corpus. Answers inside this collection link to their own answer page.
- DOPPLER (1 uses in xd)
Other clues for MACH
Every other clue in this collection answered by MACH, most used first.
- Speed-of-sound word - used 25 times, most recently in 2025
- ___ 1 (speed of sound) - used 21 times, most recently in 2026
- Jet speed measure - used 19 times, most recently in 2026
- Speed-of-sound ratio - used 17 times, most recently in 2026
- Speed ratio - used 17 times, most recently in 2021
- Physicist Ernst - used 11 times, most recently in 2025
- Speed-of-sound number - used 10 times, most recently in 2026
- Supersonic unit - used 9 times, most recently in 2024
- Jet speed unit - used 8 times, most recently in 2014
- Supersonic speed unit - used 8 times, most recently in 2025
- Airspeed ratio - used 6 times, most recently in 2026
- Eponymous physicist Ernst - used 6 times, most recently in 2021
Related clues
Clues in this collection of the same answer length that share a word with this clue, or match its answer pattern when no word is shared. Most used first.
- Physicist Niels - BOHR, used 50 times
- Austrian river - ENNS, used 44 times
- Danish physicist - BOHR, used 16 times
- Austrian peaks - ALPS, used 12 times
- Austrian statesman - RAAB, used 12 times
- Nobel physicist Niels - BOHR, used 12 times
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