alembroth
noun
alem·broth
ə-ˈlem-ˌbrȯth,
ˈa-ləm-
plural -s
: a double chloride of ammonium and mercury believed by the alchemists to be a universal solvent
called also key of art, salt of wisdom
Word History
Etymology
Middle English alembroth, alembroke, albrot
First Known Use
circa 1726, in the meaning defined above