- As a numeral, L stands for fifty in the English, as in the Latin
language. - 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.
- A short right-angled pipe fitting, used in connecting two pipes
at right angles.