Definition

1. Noun:
   • A temperature scale: The Celsius scale is a system for measuring temperature. It is defined by setting the freezing point of water at 0 degrees and the boiling point of water at 100 degrees under standard atmospheric pressure.

Usage

• The Celsius scale is used globally for most scientific work and in daily life in most countries around the world.
• It is the scale commonly used in weather forecasts, cooking instructions, and medical measurements (like body temperature) outside of the United States.

Examples

Advanced Usage

• "Degrees Celsius": The standard unit of measurement on this scale, abbreviated as °C.
  • The lab must be kept at a constant 22 degrees Celsius.
• Historical Context: Also known historically as the centigrade scale, from "centi-" (hundred) and "grade" (step), referring to the 100-degree interval between the defined points.

Variants and Related Words

• Centigrade (adj/n): An older, synonymous term for the Celsius scale, though "Celsius" is now the preferred name.
  • The temperature is 20 degrees centigrade.
• Kelvin scale (n): A related absolute temperature scale where 0 K (zero kelvin) is absolute zero. A change of 1 kelvin is equal to a change of 1 degree Celsius.

Synonyms

• Centigrade scale: (Historical/alternative name)

Notes

• The Celsius scale is named after the Swedish astronomer Anders Celsius, who proposed a similar scale in 1742.
• To convert from Fahrenheit to Celsius, you subtract 32, then multiply by 5/9. To convert from Celsius to Fahrenheit, you multiply by 9/5, then add 32.

Noun

1. a temperature scale that defines the freezing point of water as 0 degrees and the boiling point of water as 100 degrees