An electrical switch, in a generator or motor, that periodically reverses the direction of an electric current.
A binary map in a given group G, given by [g, h] = ghg⁻¹h⁻¹, where g and h are elements of G, which yields the group's identity if and only if the group operation commutes for g and h.
A binary map in a given ring R, given by [a, b] = ab − ba, where a and b are elements of R, which yields the ring's zero element if and only if the multiplication operation commutes for a and b.
The setting, on a portable electronic device, that causes it to vibrate rather than sound any (or most) needed alarms.
To use vibrato.
To affect with vibratory motion; to set in vibration.
To brandish; to swing to and fro.
To resonate.
To shake with small, rapid movements to and fro.
To mark or measure by moving to and fro.