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cis

[ sis ]
/ sɪs /
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adjective

cisgender or cissexual: He may not be macho, but he's definitely a cis male.

noun

a person who is cisgender or cissexual.

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Origin of cis

By shortening

usage note for cis

See trans, gender1.

Definition for cis (2 of 3)

cis-

a prefix occurring in loanwords from Latin meaning “on the near side of; on this side of” (cisalpine); on this model, used in the formation of compound words (cisatlantic).
Chemistry. a specialization of this denoting a geometric isomer having a pair of identical atoms or groups attached on the same side of two atoms linked by a double bond.Compare trans- (def. 2).
a prefix meaning “on the same side of,” referring to the alignment of one’s gender identity with one’s sex assigned at birth (cisgender; cissexual).

Origin of cis-

From Latin cis (adverb and preposition) “on this side, on this side of, within”

Definition for cis (3 of 3)

C.I.S.

abbreviation

Commonwealth of Independent States.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for cis

British Dictionary definitions for cis (1 of 2)

CIS

abbreviation for

Commonwealth of Independent States

British Dictionary definitions for cis (2 of 2)

cis-

prefix

on this or the near side ofcisalpine
(often in italics) indicating that two groups of atoms in an unsaturated compound lie on the same side of a double bondcis- butadiene Compare trans- (def. 5)

Word Origin for cis-

from Latin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for cis (1 of 2)

cis
[ sĭs ]

adj.

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

Medical definitions for cis (2 of 2)

cis-

pref.

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:cis-butene.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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