Dictionary.net

the cardinal number that is the sum of nine and one; the base of the decimal system

the cardinal number that is the sum of nine and one; the base of the decimal system

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.

1. The Roman numeral 10. 2. In homeopathy, noting the decimal scale of dilutions or potencies; see potency. 3. Abbreviation for Kienboeck's unit. 4. Chemical symbol for xenon.

Twenty-fourth letter of the alphabet. As a Roman numeral, it stands for ten; after a proper name, for the tenth, as Leo X.

The twenty-fourth letter in the English alphabet.

Is the twenty-fourth letter of the English alphabet. In the middle and at the end of words it has the sound of ks or qs. At the beginning of a word it has precisoly the sound of z. It is used as an initial only in a few words borrowed from the Greek. As a numeral, X stands for ten; when horizontal, for 1,000; a dash over it, for ten thousand. It is the symbol of the unknown quantity in algebra. As an abbreviation, X. stands for Christ, as in Xn., Christian.

the twenty-fourth letter of the English alphabet, is borrowed, as to its form, from the Greek X, and is not found as an initial letter, with one exception, unless in words of Greek origin. It is called a consonant or compound consonantal sound, being at once guttural, palatal, and sibilant. At the end of words it has the sound of ks, as in wax; in the middle, the sound of ks, or sometimes of gz, as in axis, example. At the beginning of a words, x is pronounced as z.