CIS Definition

sis
abbreviation
Commonwealth of Independent States.
Webster's New World
Commonwealth of Independent States.
Wiktionary
(Canada, sports) Canadian Interuniversity Sport.
Wiktionary
prefix
On this side.
Cisatlantic.
American Heritage
Having a pair of identical atoms or groups on the same side of a plane that passes through two carbon atoms linked by a double bond. Used of a geometric isomer.
Cis-2-butene.
American Heritage
affix
On this side of.
Cisalpine.
Webster's New World
Subsequent to.
Webster's New World
Designating an isomer having certain atoms or groups on the same side of a given plane in the molecule.
Cis-butene.
Webster's New World
adjective

(biology) Having two mutations on two genes on the same chromosome of a homologous pair.

Wiktionary
(cytology) Of the side of the Golgi apparatus nearer to the endoplasmic reticulum.
Wiktionary
(chemistry) Alternative form of cis-.
Wiktionary

(LGBT) Cisgender or cissexual: not trans (transgender or transsexual).

Wiktionary

Origin of CIS

  • From Latin cis (“on the same side”). The gender-related sense is a clipping of cissexual or of cisgender (from Latin cis).

    From Wiktionary

  • Latin from cis on this side of ko- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

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