Noun | 1. | ![]() dilleniid dicot genus - genus of more or less advanced dicotyledonous trees and shrubs and herbs family Tamaricaceae, Tamaricaceae, tamarisk family - family of desert shrubs and trees (mostly halophytes and xerophytes) tamarisk - any shrub or small tree of the genus Tamarix having small scalelike or needle-shaped leaves and feathery racemes of small white or pinkish flowers; of mostly coastal areas with saline soil |