euphorbium
noun
eu·phor·bi·um
plural -s
: a yellow or brownish very acrid gum resin derived from a Moroccan spurge (Euphorbia resinifera) and other African spurges and formerly employed medicinally as an emetic and cathartic but now used chiefly in veterinary medicine as a vesicant
Word History
Etymology
Middle English euforbium, from Medieval Latin, from Greek euphorbion euphorbium, euphorbia, from Euphorbus