voltmeter (volt'me-ter)

An instrument for indicating the voltage of an electric current. ure.] {.Volt, + Gr., metron, a me as volume (vol'um). Bulk, equivalent v., molecular v. The v. occupied by a molecule of a substance in the gaseous state. At the ordinary conditions of temperature and pre ure the m. v. of all chemical compounds is 22.4 liters. In the gaseous state, and under equal conditions of temperature and pre ure, the molecular v's are the same for all substances, and are equal to the molecular weights divided by the specific gravity referred to hydrogen as a unit. In the solid and liquid states the molecular v. is equal to the molecular weight divided by the specific gravity referred to water as a unit. [Lat., volumen, volume.]