Synonyms of CIS

noun

1. an alliance made up of states that had been Soviet Socialist Republics in the Soviet Union prior to its dissolution in Dec 1991

   Also: commonwealth of independent states.

2. 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

   • CURIE7

   Not playable in Scrabble US: CI.