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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.
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Origin of chi1

From Greek

chi2

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

[chahy]
noun
  1. Chicago.
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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.
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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.
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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
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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
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Word Origin

Chinese, literally: energy

qi

noun
  1. a variant of chi 2
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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.

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qi

n.

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

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Online Etymology Dictionary, © 2010 Douglas Harper