mole plant n 1: showy poinsettia found from the southern United States to Peru [syn: {Japanese poinsettia}, {mole plant}, {paint leaf}, {Euphorbia heterophylla}] 2: poisonous Old World spurge; adventive in America; seeds yield a purgative oil [syn: {caper spurge}, {myrtle spurge}, {mole plant}, {Euphorbia lathyris}]