Crossword Helper

The Clue

Speed ratio (4 letter answer)

The Answer

MACH

Tags

Notes

The answer MACH is uncommon, appearing about once every 375 puzzles.

Related Clues

Airspeed number
Airspeed unit
Austrian physicist
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Kind of number
Physicist Ernst
SST word
Supersonic number
Supersonic unit
High-speed number
Jet speed measure
Jet speed number
Jet speed unit
Jet-speed unit
Number associated with a boom
___ number (speed measure)
___ number (speed ratio)
Physicist with an eponymous number
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Sound-barrier word
Sound-speed number
Sound-speed word
Speed-ratio number
Speed-of-sound number
Word with wave or number
Austrian physicist: 1838-1916
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Name often followed by a number
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Word before 1 or 2
Word often followed by a numeral

Definition

MACH as a noun:

1. (Mach, Ernst Mach) = Austrian physicist and philosopher who introduced the Mach number and who founded logical positivism (1838-1916)