The speed of sound

This crossword clue is for the definition: The speed of sound.
it’s A 18 letters crossword puzzle definition.
Next time, when searching for online help with your puzzle, try using the search term “The speed of sound crossword” or “The speed of sound crossword clue”. The possible answerss for The speed of sound are listed below.

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Possible Answers: MACH ONE.

Last seen on: NY Times Crossword 18 Nov 20, Wednesday