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Definitions of xi:

noun:   the 14th letter of the Greek alphabet
noun:   the cardinal number that is the sum of ten and one
adjective:   being one more than ten

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Alternative Terms
greek-alphabet-2 alpha-greek-letter nu beta gamma omicron delta-letter pi-letter epsilon rho-letter zeta-2 sigma eta-greek-letter tau theta upsilon iota phi kappa chi-letter lambda psi mu-2 omega digamma qoppa stigma-letter sampi san-letter sho-letter diacritics english-language greek-language greek-numerals x-dark-horse-comics xi-alternate-png random-variable stoichiometry chemical-engineering eigenvalue-eigenvector-and-eigenspace pareto-distribution riemann-zeta-function mathematics riemann-xi-function damping-factor tuned-circuit set-theory hemoglobin xi-particle z-notation early-cyrillic-alphabet ksi li-shan pearl-river-china lijiang-river list-of-rivers-by-average-discharge guzhen-town chen-cheng-ming-dynasty xu-xiake la-palanquin-des-larmes why-why-love red-scarf-girl health-qigong transport-in-the-people-s-republic-of-china global-200 list-of-rivers-by-length