Alphabet "X", Words With "X"

"X" is twenty fourth alphabet and nineteenth constant letter of the modern English alphabet, it can be used to represent twenty fourth (24th) position in a series or row. An example of "X" is the letter that ends the word phoenix or the letter that start the word xray. In mathematics, alphabet or letter x is used to name an independent variable or unexplained value that must be solved for. X is often used to signify the multiplication operation in algebra. X is also used for referring to 'the end of conversation'. X is also used as a generic mark i.e selecting an item on a form or document or indicating a location on a map, etc. "X" is a letter that is put in place where a quantity or answer is unknown, or when a generic placeholder is required. In simple words the emphasis on "X" un X plained.
Some commonly used words starting with alphabet "X" are: x ray, x mas, xmas tree, xylophone.