Chi or X is often used to abbreviate the name Christ, as in the holiday Christmas (Xmas). When fused within a single typeface with the Greek letter rho, it is called the Chi Rho and used to represent the …

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: vital energy that is held to animate the body internally and is of central importance in some Eastern systems of medical treatment (such as acupuncture) and of exercise or self-defense (such as tai chi)

Chi-squared distribution, showing χ2 on the first axis and p -value (right tail probability) on the second axis. A chi-squared test (also chi-square or χ2 test) is a statistical hypothesis test used in the …

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Jul 8, 2025 · Chi (noun): A short form for "Chicago," commonly used in informal speech or writing. The word "chi" carries diverse meanings, spanning cultural, philosophical, linguistic, and geographical …

In mathematics, the Greek letter chi is used as a symbol for characteristic polynomial or characteristic function. This greek letter is also mentioned as a symbol in Plato's "Timaeus" and Thomas Browne's …

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