KI

Ki or KI may refer to:

In arts and entertainment

Gaming

• Killer Instinct (video game series), video game
• Kid Icarus, video game
• KI, a D'ni communication device used in the game Uru: Ages Beyond Myst
• King's Indian, a common chess opening

Music

• Ki (Devin Townsend Project album), 2009
• Ki (Kitaro album), 1979

Other media

• Kambakkht Ishq, a 2009 Hindi language film
• Kids Incorporated, a television series

Businesses and organizations

• KÍ Klaksvík, a Faroese semi-professional football club
• Communist Initiative, Marxist–Leninist organisation in Austria
• Karolinska Institutet, Swedish university
• Kenyon Institute, a British research institute in Jerusalem
• Adam Air (airline code KI)

In language

• ki, the Gikuyu language
• Ki language, a Southern Bantoid language of Cameroon
• Ki (kana), a Japanese syllabic character
• Ki, meaning "Earth" in ancient Sumerian

Names

• Ki (Korean surname), a Korean surname
• Ki or Qi (surname)
• Ki or Ji (surname)

Places

• Ki Monastery, in India
• Kangaroo Island, Australia
• Kings Island, Ohio, United States, amusement park owned by Cedar Fair Entertainment Company
• Kiribati
  • .ki, the ISO 3166-1 alpha-2 country code top level domain for Kiribati

In religion and metaphysics

• Ki (goddess)
• Qi, Ki or chi, a Chinese metaphysical life-force concept (in Japanese and McCune–Reischauer-type Korean transliteration)
• Books of Kings, in Judaeo-Christian religious texts
• Kitáb-i-Íqán (Book of Certitude), a Bahá'í text

In science and technology

Biology and chemistry

• Ti (plant), also called Kī
• K_i, an equilibrium constant for a chemical reaction or process "i", eg.:
  • dissociation constant applicable to process, abbreviated as "i".
  • the measure of bond-tightness between an enzyme and a corresponding enzyme inhibitor
  • the measurement of ligand binding affinity
• KI, Potassium iodide
• Gene knockin or Knock-in, a genetic engineering method
• Ki Database, a database of biochemical information

Computing

• Ki (prefix symbol), the prefix symbol of the binary unit prefix kibi
• Ki, International Electrotechnical Commission standard symbol for number 1024
• K-I algorithm, Kittler and Illingworth iterative algorithm for image segmentation thresholding
• Ki (or K_i), the unique cryptographic key of each cell phone's SIM

Other uses

• Knowledge integration, in epistemology
• Grover C. Winn (1886–1943), nicknamed "Ki", American lawyer and politician