- William John Mac·quorn [muh–kwawrn] /məˈkwɔrn/, 1820–70, Scottish engineer and physicist.
- Thermodynamics. pertaining to an absolute temperature scale (Rankine scale) in which the degree intervals are equal to those of the Fahrenheit scale and in which 0° Rankine equals −459.7° Fahrenheit.Compare absolute temperature scale, Kelvin(defs 2, 3).
- an absolute scale of temperature in which the unit of temperature is equal to that on the Fahrenheit scale and the zero value of temperature is equal to –459.67°FCompare Kelvin scale
- A scale of absolute temperature having the same degree increments as those of the Fahrenheit scale, in which the freezing point of water is 491.69° and the boiling point is 671.69°. A temperature in degrees Fahrenheit is converted to a temperature in degrees Rankine by the addition of 459.67°.