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chi1

[kahy]
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noun, plural chis.
  1. the twenty-second letter of the Greek alphabet (X, χ).
  2. the consonant sound represented by this letter.

Origin of chi1

From Greek

chi2

[chee]
noun Wade-Giles.
  1. qi.

Chi

[chahy]
noun
  1. Chicago.

Origin of Chi

by shortening

qi

[chœ]
noun Pinyin.
  1. (in traditional Chinese medicine and philosophy) the vital life force that flows through the body and is supposedly regulated by acupuncture.
Also Wade-Giles, chi.

Origin of qi

From the Chinese word breath

Ch'i

[chyee]
noun
  1. one of two dynasties that ruled in China a.d. 479–502 and, as the Northern Ch'i, a.d. 550–77.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for chi

chi1

noun
  1. the 22nd letter of the Greek alphabet (Χ, χ), a consonant, transliterated as ch or rarely kh

chi2

ch'i or qi

noun
  1. (sometimes capital) (in Oriental medicine, martial arts, etc) vital energy believed to circulate round the body in currents

Word Origin

Chinese, literally: energy

qi

noun
  1. a variant of chi 2
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

Word Origin and History for chi

n.

22nd letter of the Greek alphabet, representing a -kh- sound (see ch). The letter is shaped like an X, and so the Greek letter name was used figuratively to signify such a shape or arrangement (e.g. khiasma "two things placed crosswise;" khiastos "arranged diagonally; marked with an X;" khiazein "to mark with an 'X', to write the letter 'X'"). Some dialects used chi to represent the -ks- sound properly belonging to xi; Latin picked this up and the sound value of chi in Latin-derived alphabets is now that of English X.

qi

n.

"physical life force," 1850, from Chinese qi "air, breath."

Online Etymology Dictionary, © 2010 Douglas Harper