| Noun | 1. | magnoliid dicot family - family of dicotyledonous flowering plants regarded as among the most primitive of extant angiospermsMagnoliidae, ranalian complex, subclass Magnoliidae - a group of families or trees and shrubs and herbs having well-developed perianths and apocarpous ovaries and generally regarded as the most primitive extant flowering plants; contains 36 families including Magnoliaceae and Ranunculaceae; sometimes classified as a superorder | |