Eponymous physicist Ernst
The crossword clue "Eponymous physicist Ernst" is answered by MACH, a 4-letter entry. Used 6 times across 6 distinct years; most recently in 2021; first recorded in 2012. It appears in 3 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 6 times across 6 distinct years; most recently in 2021; first recorded in 2012. It appears in 3 publications in the xd corpus. Frequency and last-seen figures come from the xd crossword corpus only.
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
- Austrian physicist. - used 8 times, most recently in 2013
- 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
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
- Danish physicist - BOHR, used 16 times
- Nobel physicist Niels - BOHR, used 12 times
- Nobel prize physicist. - RABI, used 11 times
- Nobel physicist - RABI, used 10 times
- Danish physicist Niels - BOHR, used 9 times
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