\Guel"der*rose'\, n. [Supposed to be brought from
Guelderland; hence, D. Geldersche roos, G. Gelderische rose,
F. rose de Gueldre, It. rose di Gueldra, Sp. rosa de
Gueldres.] (Bot.)
A cultivated variety of a species of {Viburnum} ({V.
Opulus}), bearing large bunches of white flowers; -- called
also {snowball tree}.