cis

¹

[ sis ]

adjective

1. cisgender or cissexual:

   He may not be macho, but he's definitely a cis male.

noun

1. a person who is cisgender or cissexual.

cis-

²

1. 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 ).
2. 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 ).
3. 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 ).

C.I.S.

³

abbreviation for

1. Commonwealth of Independent States.

cis-

¹

prefix

1. on this or the near side of

   cisalpine

2. (often in italics) indicating that two groups of atoms in an unsaturated compound lie on the same side of a double bond Compare trans-

   cis-butadiene

CIS

²

abbreviation for

1. Commonwealth of Independent States

Sensitive Note

See trans, gender ¹.

Word History and Origins

Origin of cis¹

By shortening

Origin of cis²

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

Word History and Origins

Origin of cis¹

from Latin