| Noun | 1. | asterid dicot genus - genus of more or less advanced dicotyledonous herbs and some trees and shrubs aster family, Asteraceae, Compositae, family Asteraceae, family Compositae - plants with heads composed of many florets: aster; daisy; dandelion; goldenrod; marigold; lettuces; ragweed; sunflower; thistle; zinnia gayfeather, gay-feather, snakeroot, blazing star, button snakeroot - any of various North American plants of the genus Liatris having racemes or panicles of small discoid flower heads |