略語大辞典 [E] 31 RMS root-mean-square 自乗平均根. 交流信号の実効値.root-mean-square; or r.m.s.; e.g. a true RMS value of an AC signal is defined as the square root of the average of the square of the input signal; [E:C]. 丸善「略語大辞典」JLogosID : 11857933