cis Meaning, Definition & Usage

1. noun an alliance made up of states that had been Soviet Socialist Republics in the Soviet Union prior to its dissolution in Dec 1991
   Commonwealth of Independent States.
   
2. noun a unit of radioactivity equal to the amount of a radioactive isotope that decays at the rate of 37,000,000,000 disintegrations per second
   curie; Ci.
   

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