Cis

Cis may have the following meanings:


 * "Cis-" as a prefix of Latin origin, meaning "on the same side [as]" or "on this side [of]", with several derived usages:
 * In chemistry, cis- refers to cis-trans isomerism
 * In molecular biology, cis- refers to cis-acting
 * In gender studies, cis- refers to cisgender
 * In music, cis is another name for C♯ (musical note)
 * In Euler's formula, the function cis(θ) = cos θ + i·sin θ
 * In geography:
 * Cis, Trentino, a municipality in northern Italy
 * Cis, Świętokrzyskie Voivodeship, south-central Poland
 * Cis, Warmian-Masurian Voivodeship, north Poland
 * Cis (beetle), a genus of minute tree-fungus beetles