Meaning of X in English
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. ·see guide to pronunciation, // 217, 270, 271.
Webster English vocab. Английский словарь Webster. 2012