Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

cis

play
adjective \ˈsis\

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



Origin and Etymology of cis

Latin, literally, on this side


First Known Use: 1888

Rhymes with cis


CIS

abbreviation

Definition of CIS

  1. Commonwealth of Independent States




cis-

prefix

Definition of cis-

  1. 1 :  on this side <cislunar> <cisatlantic>

  2. 2 usually italic :  cis <cis-dichloroethylene> — compare trans- 2b



Origin and Etymology of cis-

Latin, from cis — more at he


Medical Dictionary

cis

play
adjective \ˈsis\

Medical Definition of cis

  1. 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. 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




CIS

abbreviation

Medical Definition of CIS

  1. carcinoma in situ




Seen and Heard

What made you want to look up cis? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to proceed clumsily or ineffectually

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

lavender-fields-in-france

Which of these is a synonym of caesura?

rebellion torrent megillah interruption
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ