thermometer

n. device used for measuring temperature

A thermometer is a device that measures temperature or temperature gradient, using a variety of different principles. The word thermometer is derived from two smaller word fragments: thermo from the Greek for heat and meter from Greek, meaning to measure. A thermometer has two important elements, the temperature sensor (e.g. the bulb on a mercury thermometer) in which some physical change occurs with temperature, plus some means of converting this physical change into a value (e.g. the scale on a mercury thermometer). Industrial thermometers commonly use electronic means to provide a digital display or input to a computer.
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Thermometer /ther·mom·e·ter/ an instrument for determining temperatures, in principle making use of a substance with a physical property that varies [more]Thermometer - Community and Resources

Noun
1. measuring instrument for measuring temperature
(hypernym) measuring instrument, measuring system, measuring device
(hyponym) alcohol thermometer, alcohol-in-glass thermometer
(part-meronym) capillary, capillary tube, capillary tubing

n. thermometer, device used for measuring temperature