American English abbreviation of elevated railroad, first recorded 1906 in O. Henry. See L.
el
Spanish article, from Latin ille "that" (see le).
Entries linking to el
le
French masc. definite article (including the old neuter), fem. la, from Latin ille "he, that," used in Late Latin and Medieval Latin as the definite article. Cognate with Spanish el. Latin ille "that," illa "by that way, there," replaced Old Latin olle/ollus, perhaps by analogy with iste [de Vaan]; from PIE *hol-no- "that, yonder."
L
twelfth letter, Roman form of Greek lambda, which is from the Semitic lamed. The shape of the Roman letter is an early one in Greek, adopted in Italic before it was superseded in Greek by the inverted form which became the Greek lambda. In some words (ladder, lady, laughter, leap, listen, lid) it represents Old English hl-. As "building or extension in the shape of an L" from 1843. As an "alphabetic abbreviation" [OED] of elevated railway, from 1881 (compare el). The Three Ls in nautical navigation were "lead" (for sounding), "latitude" and "lookout."