Mach number

Etymology
After physicist.

Noun

 * 1)  The ratio of the speed of a body to that of sound in the surrounding medium.

Translations

 * Arabic:
 * Armenian:
 * Catalan: nombre de Mach
 * Chinese:
 * Mandarin:
 * Czech: Machovo číslo
 * Dutch: machgetal
 * Esperanto:
 * Estonian:
 * Finnish: Machin luku
 * Georgian:
 * German: Mach-Zahl
 * Greek: αριθμός Μαχ
 * Hebrew:
 * Italian: numero di Mach
 * Japanese:
 * Korean:
 * Portuguese: número de Mach, número Mach
 * Romanian:
 * Spanish: número Mach
 * Thai: เลขมัค
 * Turkish: Mach sayısı