- mercury thermometer, 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 tube
--1 is a kind of thermometer
--1 has parts: bulb
--1 has particulars:Beckman thermometer; clinical thermometer, mercury-in-glass clinical thermometer