Meaning of X in English

X

X, the twenty-fourth letter of the English alphabet, has three sounds; a compound nonvocal sound (that of ks), as in wax; a compound vocal sound (that of gz), as in example; and, at the beginning of a word, a simple vocal sound (that of z), as in xanthic.

Webster's Revised Unabridged English Dictionary.      Пересмотренный полный словарь английского языка Webster.