ammoniac
am•mo•ni
[[ME ammoniak < ML armoniac < L ammoniacum < Gr ammōniakon, gum resin: orig., prob. from its occurrence in plants growing near the temple of Jupiter Ammon1 in Egypt]]
a pungent gum resin obtained from the stems of certain plants (esp. Dorema ammoniacum) of the umbel family, found in Iran, S Siberia, and N India: used in perfumes, adhesives, and porcelain cements, and formerly in medicine