Are two names for essentially the same temperature scale (with slight differences). The centigrade scale is divided into degrees based on dividing the temperature between which water freezes and boils into 100 equal gradients or degrees. The word centigrade comes from 'centi-' for 100 and 'grade' for gradients. The centigrade scale was introduced in 1744 and remained the primary scale of temperature until 1948. In 1948 the CGPM (Conference General des Poids et Measures) decided to standardize several units of measurement, including the scale.
Since the 'grade' was in use as a unit (including the 'centigrade'), a new name was chosen for the temperature scale: Celsius.
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