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Adjective: cis  sis
  1. Of or relating to people whose gender identity is the same as their birth sex; not transgender
    - cisgender, cisgendered
Noun: CIS
  1. 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
Noun: Ci
  1. 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

Sounds like: si

Type of: global organisation [Brit], global organization, international organisation [Brit], international organization, radioactivity unit, world organisation [Brit], world organization

Encyclopedia: Cis,cis-Muconic acid