elm \elm\, n. as. elm; akin to d. olm, ohg. elm, g. ulme, icel.
   almr, dan.  sw. alm, l. ulmus, and e. alder. cf. old.
   bot.
   a tree of the genus ulmus, of several species, much used as
   a shade tree, particularly in america. the english elm is
   ulmus campestris; the common american or white elm is u.
   americana; the slippery or red elm, u. fulva.
   1913 webster

   elm beetle zo"ol., one of several species of beetles
      esp. galeruca calmariensis, which feed on the leaves
      of the elm.

   elm borer zo"ol., one of several species of beetles of
      which the larvae bore into the wood or under the bark of
      the elm esp. saperda tridentata.

   elm butterfly zo"ol., one of several species of
      butterflies, which, in the caterpillar state, feed on the
      leaves of the elm esp. vanessa antiopa and grapta
      comma. see comma butterfly, under comma.

   elm moth zo"ol., one of numerous species of moths of
      which the larvae destroy the leaves of the elm esp.
      eugonia subsignaria, called elm spanworm.

   elm sawfly zo"ol., a large sawfly cimbex americana.
      the larva, which is white with a black dorsal stripe,
      feeds on the leaves of the elm.
      1913 webster
see also:
old ulmus ulmus campestris u. americana u. fulva elm beetle 
galeruca calmariensis elm borer saperda tridentata elm butterfly vanessa antiopa 
grapta comma comma butterfly comma elm moth eugonia subsignaria 
elm sawfly cimbex americana