- any plant belonging to one of the two major groups of flowering plants, comprising over 60 per cent of all plants, normally having net-veined leaves and two cotyledons in the seed
- An angiosperm having two cotyledons in the seed, leaves with a network of veins radiating from a central main vein, flower parts in multiples of four or five, and a ring of vascular cambium in the stem. In contrast to most monocotyledons, eudicotyledons undergo secondary growth. Eudicotyledons are the largest angiosperm group; they include most cultivated plants and many trees.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.