DICOTYLEDON

[di.cot.y.le.don] n [NL] (ca. 1727): any of a class or subclass (Magnoliopsida or Dicotyledoneae) of angiospermous plants that produce an embryo with two cotyledons and usu. have floral organs arranged in cycles of four or five and leaves with reticulate venation--compare monocotyledon -- di.cot.y.le.don.ous adj