Cis

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 (the norm)
 * C♯ (musical note), known as cis in some European notations