Thermometer Definition

thər-mŏmĭ-tər
thermometers
noun
An instrument for measuring temperatures, consisting of a graduated glass tube with a sealed, capillary bore in which mercury, colored alcohol, etc. rises or falls as it expands or contracts with changes in temperature.
Webster's New World
Any similar instrument, as one operating by means of a thermocouple.
Webster's New World

An apparatus used to measure temperature.

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Other Word Forms of Thermometer

Noun

Singular:
thermometer
Plural:
thermometers

Origin of Thermometer

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thermometer