Last Updated：2025/11/20
(physics) a ratio of the speed (of an object, etc.) to the speed of sound in the fluid or other medium through which the object travels. Usually used to describe supersonic speeds; the Mach number.
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Mach
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Source Word
Mach
IPA(Pronunciation)
Noun
uncountable
Japanese Meaning
音速に対する移動速度の割合、すなわちマッハ数。物体の速度と流体中の音速との比率を示す物理用語。
