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The Collaborative International Dictionary of English v.0.48 (gcide)

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["o]l.), one of several species of beetles
(esp. {Galeruca calmariensis}), which feed on the leaves
of the elm.

{Elm borer} (Zo["o]l.), one of several species of beetles of
which the larv[ae] bore into the wood or under the bark of
the elm (esp. {Saperda tridentata}).

{Elm butterfly} (Zo["o]l.), 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["o]l.), one of numerous species of moths of
which the larv[ae] destroy the leaves of the elm (esp.
{Eugonia subsignaria}, called elm spanworm).

{Elm sawfly} (Zo["o]l.), a large sawfly ({Cimbex Americana}).
The larva, which is white with a black dorsal stripe,
feeds on the leaves of the elm.
[1913 Webster]