Resolution 9 of the 11th CGPM (1960)
Definition of the unit of time (second)
The 11th Conférence Générale des Poids et Mesures (CGPM),
considering
- the powers given to the Comité International des Poids et Mesures (CIPM) by the
10th CGPM to define the fundamental unit of time, - the decision taken by the CIPM in 1956,
ratifies the following definition:
"The second is the fraction
reference
The reader should note that the official version of this Resolution is the French
text
NOTE
This definition was abrogated in 1967 by the 13th CGPM (Resolution 1).