[red.root] n (1709) 1: a perennial herb (Lachnanthes caroliniana syn. L. tinctoria) of the bloodwort family of the eastern U.S. whose red root is the source of a dye
2: new jersey tea
3: bloodroot
4: a pigweed (Amaranthus retroflexus) that bears greenish flowers in dense spikes with bracts almost twice as long as the sepals