Fahrenheit \Fah"ren*heit\a. [G.]

Conforming to the scale used by Gabriel Daniel Fahrenheit in the graduation of his thermometer; of or relating to Fahrenheit's thermometric scale. -- n. The Fahrenheit termometer or scale.

Note: The Fahrenheit thermometer is so graduated that the freezing point of water is at 32 degrees above the zero of its scale, and the boiling point at 212 degrees above. It is commonly used in the United States and in England.

Source: Webster's Revised Unabridged Dictionary (1913)