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Cis or cis- may refer to:

Places

• Cis, Trentino, in Italy
• In Poland:
  • Cis, Świętokrzyskie Voivodeship, south-central
  • Cis, Warmian-Masurian Voivodeship, north

Math, science and biology

• cis (mathematics) (cis(θ)), a trigonometric mathematical function related to Euler's formula
• Cis (beetle), genus
• Cis–trans isomerism, in chemistry
• cis-regulatory element, regions of non-coding DNA which regulate the transcription of nearby genes

Other uses

• Cisgender, a descriptor for somebody whose gender identity matches their assigned gender at birth
• C♯ (musical note), known as cis in some European notations

See also

• CIS (disambiguation)
• All pages with titles beginning with Cis
• Ciss (disambiguation)
• Csi (disambiguation)