from
The Collaborative International Dictionary of English v.0.48
Alder \Al"der\ ([add]l"d[~e]r), n. [OE. aldir, aller, fr. AS.
alr, aler, alor, akin to D. els, G. erle, Icel. erlir, erli,
Swed. al, Dan. elle, el, L. alnus, and E. elm.] (Bot.)
A tree, usually growing in moist land, and belonging to the
genus {Alnus}. The wood is used by turners, etc.; the bark by
dyers and tanners. In the U. S. the species of alder are
usually shrubs or small trees.
[1913 Webster]
{Black alder}.
(a) A European shrub ({Rhamnus frangula}); Alder buckthorn.
(b) An American species of holly ({Ilex verticillata}),
bearing red berries.
[1913 Webster] Alder