voltmeter
Meaning
An instrument for measuring electric potential difference between two points in an electric circuit.
Structure
Usage
The technician used a digital voltmeter to check the battery's voltage.
For safety, always ensure the voltmeter is set to the correct range before taking a measurement.
A significant drop in reading on the voltmeter indicated a problem in the circuit.
Etymology
The word 'voltmeter' is a modern scientific compound, formed in the 19th century following the standardization of electrical units. Its first element, 'volt', immortalizes the pioneering work of Alessandro Volta, inventor of the electric battery, whose surname became the unit for electromotive force. The second element, 'meter', has a deep classical heritage, descending from the Greek 'metron' (a measure), a concept fundamental to science and mathematics. Thus, the term's logic is transparently descriptive: it literally means "a measurer of volts," directly naming the specific physical quantity the instrument is designed to quantify.
Analysis
volt: Named after Alessandro Volta (Italian physicist). The name 'Volta' is of uncertain origin, possibly from a Germanic root related to turning or rolling. meter: From Greek 'metron', meaning "measure". Via French 'mètre' and Latin 'metrum'.