Original: The 9th CGPM (ConfÃ rence gÃ nÃ rale des poids et mesures) and the CIPM (ComitÃ international des poids et mesures) formally adopted "degree Celsius" (symbol: Â C) in 1948.
Simplified: The 9th CGPM (ConfÃ rence gÃ nÃ rale des poids et mesures) and the CIPM (ComitÃ international des poids et mesures) formally adopted â degree Celsiusâ (symbol: Â C) in 1948.