What does "bloodroot" mean?

Bloodroot: A plant (Sanguinaria Canadensis), with a red root and red sap, and bearing a pretty, white flower in early spring; -- called also puccoon, redroot, bloodwort, tetterwort, turmeric, and Indian paint. It has acrid emetic properties, and the rootstock is used as a stimulant expectorant. See Sanguinaria. Note: In England the name is given to the tormentil, once used as a remedy for dysentery.