Dicotyledon

The name for one of the two former groups (the other being Monocotyledon) into which Angiosperms were categorized. However, the Angiosperm Phylogeny Group (AGP) has determined by molecular analysis that not all of the plants previously placed within the dicotyledon group had a common ancestor. The majority of dicotyledons are now classified in the Eudicot Clade. See Eudicots for typical dicotyledon characteristics.