text: 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 .