Any of various flowering plants that are neither eudicotyledons nor monocotyledons, having embryos with two cotyledons and usually long, broad leaves and large flowers, and including magnolias, the avocado tree, and the cinnamon tree.
Origin of magnoliidNew Latin Magnoliidae name of the subclass including magnoliid species in several taxonomic systems Magnolia type genus of the subclass ; see magnolia . -idae suff. forming taxonomic names ( from pl. of Latin -idēs masculine patronymic suff. ) ( from Greek)