a plant, Euphorbia (Poinsettia) pulcherrima, of the spurge family, native to Mexico and Central America, having variously lobed leaves and brilliant scarlet, pink, or white petallike bracts.
Origin: 1830–40; < NL, named after J. R. Poinsett (1799–1851), American minister to Mexico, who discovered the plant there in 1828; see -ia
poin·set·ti·a (poin-sět'ē-ə, -sět'ə) n. A tropical American shrub (Euphorbia pulcherrima) that has showy, usually scarlet bracts beneath the small yellow flowerlike inflorescences.
[New Latin, after Joel Roberts Poinsett (1779-1851), American diplomat.]
1836, Mod.L. genus name, in allusion to Joel R. Poinsett (1779-1851), U.S. ambassador to Mexico, who is said to have brought the plant to the attention of botanists.