A metric scale of temperature of which 0º is the point at which water freezers and 100º is the point at which water boils under average atmospheric conditions.
To a temperature scale in which the freezing point of water is 0° and the boiling point is 100°, as compared with 32° and 212°, respectively on the Fahrenheit scale. The name, commonly abbreviated as C, honors Anders Celsius, who devised it. Also called centigrade.
A temperature scale on which 0° is the freezing point, and 100o the boiling point, of water.