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|Look up cis or cis- in Wiktionary, the free dictionary.|
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 music, cis is another name for C♯
- In Euler's formula, the function cis(θ) = cos θ + i·sin θ
- In geography:
- Cis (beetle), a genus of minute tree-fungus beetles
See also 
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