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cis adjective

  /sɪs/
  • Cisgender (or sometimes cissexual): not trans (transgender or transsexual) nor non-binary.
cis

CIS properNoun

  • Initialism of Commonwealth of Independent States.
CEI

cis- prefix

  /sɪs/
  • (geography) On this side of.
  • (physical chemistry) Forming names of chemical compounds in which two atoms or groups are situated on the same side of some plane of symmetry passing through the compound.
cis-
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