cis

adjective
\ ˈsis \

Definition of cis 

(Entry 1 of 3)

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

3 genetics : 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 sense 3

Definition of CIS (Entry 2 of 3)

Commonwealth of Independent States

cis-

prefix

Definition of cis- (Entry 3 of 3)

1 : on this side cislunar cisatlantic

2 : cis cis-dichloroethylene — compare trans- sense 2b

Examples of cis in a Sentence

Recent Examples on the Web: Adjective

The current volunteers and board members stepped into and took over a space that was founded on white, cis feminism (read: white supremacy). Kristi Turnquist, OregonLive.com, "Portland feminist bookstore In Other Words is closing," 6 June 2018 Of course, this is a monumental step forward for Hollywood, a town and industry that has long been dominated by straight, white, cis men. Jill Gutowitz, Glamour, "Ben Affleck and Matt Damon Vow to Work With More Women and People of Color, so That's a Start," 14 Mar. 2018 Also, this writing has been a decidedly cis hetero male perspective. Tunde Wey, San Francisco Chronicle, "Black women are the future of the food industry," 15 Dec. 2017 But Hopkins’s considerable physical beauty is cis beauty. Annie Julia Wyman, New Republic, "What Happens When a Queer Punk Hero is Accused of Sexual Assault?," 22 May 2017 Trans men and women experience discrimination in places that many cis people might not be aware of. Jihan Forbes, Allure, "Strands for Trans Aims to Create Safe Spaces for Trans People at Barbershops and Salons," 20 June 2017

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.

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First Known Use of cis

Adjective

1888, in the meaning defined at sense 1

History and Etymology for cis

Adjective

Latin, literally, on this side

Prefix

Latin, from cis — more at he

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Dictionary Entries near cis

cirs-

Cirsium

ciruela

cis

CIS

cis-

cisalpine

Statistics for cis

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Time Traveler for cis

The first known use of cis was in 1888

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More Definitions for cis

cis

adjective
\ ˈsis \

Medical Definition of cis 

(Entry 1 of 2)

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 sense 2

Medical Definition of CIS (Entry 2 of 2)

carcinoma in situ

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