Bot. any of a class (Magnoliopsida) of angiosperms, as oak trees, legumes, and cactuses, with an embryo containing two cotyledons (seed leaves), characterized by net-veined leaves, flower parts in fours or fives, and the presence of cambium
often clipped to di′cot·
Any of various flowering plants that are not monocotyledons, having two cotyledons in the seed and usually flower parts in multiples of four or five, leaves with reticulate venation, pollen with three pores, and the capacity for secondary growth. The dicotyledons, which include the eudicotyledons and the magnoliids, are no longer considered to form a single valid taxonomic group.
From di- ("two") + cotyledon ("embryonic leaf").