👉 The term "fahrenheit" is a measurement system used to measure temperature in the United States and many other countries. It was introduced by the American physicist James Watt in 1768, but it was not widely accepted until the 19th century. The Fahrenheit scale is based on the idea that water boils at 212°F (104°C) at sea level and cools to 32°F (0°C) when it reaches a temperature of 8