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

Ci

abbreviation

Definition of Ci

  1. 1 cirrus

  2. 2 curie




CI

abbreviation

Definition of CI

  1. 1 cast iron

  2. 2 certificate of insurance

  3. 3 Channel Islands




Medical Dictionary

CI

abbreviation

Medical Definition of CI

  1. chemotherapeutic index




Law Dictionary

CI

abbreviation

Legal Definition of CI

  1. certificate of insurance; cost and insurance




Learn More about ci


Seen and Heard

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

WORD OF THE DAY

at a gallop

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

alphabet-pasta-spelling-help

Which is the correct spelling?

acommodate accommodate accomodate acommadate
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