any of a genus (Rhododendron) of trees and shrubs of the heath family, mainly evergreen, with showy flowers of pink, white, or purple
See rhododendron in American Heritage Dictionary 4
(rōˌdə-dĕnˈdrən)
noun
Any of numerous usually evergreen ornamental shrubs of the genus Rhododendron of the North Temperate Zone, having clusters of variously colored, often bell-shaped flowers.