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1) The twenty-fourth (24th) and antepenultimate letter of the English alphabet. X can also mean but is not limited to the following: 2) The Roman numeral for Ten (10) 3) A variable, often seen in mathematics disciplines 4) A slang term for the drug MDMA also known as ecstasy. 5) A "kiss" when used at the end of a letter or other correspondence.
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