EUPHORBIUM
euphorbium, gum eurphorbium
(noun) an acrid brown gum resin now used mainly in veterinary medicine
Source: WordNet® 3.1
Etymology
Noun
euphorbium (uncountable)
An acrid dull yellow or brown resin consisting of the concreted milky juice of several species of Euphorbia, formerly used as a purgative and emetic.
Source: Wiktionary
Eu*phor"bi*um, n. Etym: [NL., fr. L. euphorbeum, from Gr. Euphorbus,
a Greek physician.] (Med.)
Definition: An inodorous exudation, usually in the form of yellow tears,
produced chiefly by the African Euphorbia resinifrea. It was formerly
employed medicinally, but was found so violent in its effects that
its use is nearly abandoned.
Source: Webster’s Unabridged Dictionary 1913 Edition