Meaning

noun an extension at the end and at right angles to the main building

originFrom Middle English elle, elne, from Old English eln (“the length of the forearm from the elbow to the tip of the middle finger; a unit of measure”), from Proto-West Germanic *alinu, from Proto-Germanic *alinō, from Proto-Indo-European *Heh₃l-én-eh₂, from *Heh₃l- (“elbow, forearm”). Cognate with Dutch el (“ell”), German Low German Ell (“ell”), German Elle (“ell”), Swedish aln (“cubit; ell”),…

Etymology from Wiktionary, CC BY-SA 3.0