el

Etymology 1

From Middle English, from Old English el, from Latin el (the name of the letter L).

noun

1. The name of the Latin-script letter L.
   The word length, which contains only four sounds l e ng th, is usually spell'd thus, el ee en gee tee aitch. 1773 October, The Monthly Review Or Literary Journal Enlarged

Etymology 2

noun

1. (US) An elevated railway, especially for specific systems such as the metro in Chicago.
   The main section of the Sixth Avenue El from Morris Street to Ninth Avenue and 53rd Street shut down on December 4, 1938. 2012, Roger P. Roess, Gene Sansone, The Wheels That Drove New York, page 294

Etymology 3

Shortening of eleven.

num

1. The cardinal number occurring after dek and before do in a duodecimal system. Written ↋, decimal value 11.

Etymology 4

noun

1. The name of the Cyrillic script letter Л / л.