Available Definitions:
1) - As a numeral, L stands for fifty in the English, as in the Latin language.
2) n. - An extension at right angles to the length of a main building, giving to the ground plan a form resembling the letter L; sometimes less properly applied to a narrower, or lower, extension in the direction of the length of the main building; a wing.
3) n. - A short right-angled pipe fitting, used in connecting two pipes at right angles.