Origin of elmMiddle English and OE, akin to Old High German elm: see elder
- any of a genus (Ulmus) of tall, deciduous shade trees of the elm family, once widely planted as a lawn tree
- its hard, heavy wood
- Any of various deciduous trees of the genus Ulmus, characteristically having arching or curving branches, serrate leaves with asymmetric bases, and small winged fruit.
- The wood of one of these trees.
Origin of elmMiddle English from Old English
(countable and uncountable, plural elms)
From Old English elm, from Proto-Germanic *elmaz (compare dialectal Low German Elm, dialectal German Ilm, Swedish alm), from Proto-Indo-European *h₁élem 'mountain elm' (compare Irish leamh, Latin ulmus, Albanian ulzë (“maple”)).
- (metrology) Symbol for the exalumen, an SI unit of luminous flux equal to 1018 lumens.