mercury-in-glass thermometer

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Noun

1.mercury-in-glass thermometer - thermometer consisting of mercury contained in a bulb at the bottom of a graduated sealed glass capillary tube marked in degrees Celsius or Fahrenheit; mercury expands with a rise in temperature causing a thin thread of mercury to rise in the tubemercury thermometerBeckman thermometer - a mercury thermometer that measures small differences or changes in temperaturebulb - a rounded part of a cylindrical instrument (usually at one end); "the bulb of a syringe"clinical thermometer, mercury-in-glass clinical thermometer - a mercury thermometer designed to measure the temperature of the human body; graduated to cover a range a few degrees on either side of the normal body temperaturethermometer - measuring instrument for measuring temperature