Definition of cis
1 chemistry : characterized by having certain atoms or groups of atoms on the same side of the longitudinal axis of a double bond or of the plane of a ring in a molecule … this process changes the cis form of naturally occurring fats to the trans form … — Sue Rodwell Williams
2 [by shortening] : cisgender … this whole experiment is framed within the experiences of a cis woman. — Lani Irving
Recent Examples of cis from the Web
Trans men and women experience discrimination in places that many cis people might not be aware of.
But Hopkins’s considerable physical beauty is cis beauty.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cis.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of cis
Latin, literally, on this side
First Known Use: 1888See Words from the same year
Definition of CIS
Commonwealth of Independent States
Definition of cis-
1 : on this side cislunar cisatlantic
2 usually italic : cis cis-dichloroethylene — compare trans- 2b
Medical Definition of cis
1: characterized by having certain atoms or groups of atoms on the same side of the longitudinal axis of a double bond or of the plane of a ring in a molecule
2: relating to or being an arrangement of two very closely linked genes in the heterozygous condition in which both mutant alleles are on one chromosome and both wild-type alleles are on the homologous chromosome—compare trans 2
Medical Definition of CIS
carcinoma in situ
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