What does mercury-in-glass thermometer mean?
• MERCURY-IN-GLASS THERMOMETER (noun) The noun MERCURY-IN-GLASS THERMOMETER has 1 sense: 1. 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 Familiarity information: MERCURY-IN-GLASS THERMOMETER used as a noun is very rare.