Al'der, n.

n. [A-S. aler, alor, alr, O. H. Ger. elira and erila, Ger. aller, erle, Icel. ell, elni, oln, olun, Lat. alnus.] (Bot.) A tree, usually growing in moist land, and belonging to the genus Alnus. The timber is used by turners, &c.; the bark by dyers and tanners. Loudon.