hydrargyron

Noun

 * 1) * 1563, Thomas Gale, Treatise Gonneshot, page 9b (Stanf. s.v. Guiacan):
 * Vnguentes receyuing into there composition Hydrargyron.
 * Unguents receiving into their composition hydrargyrum.
 * Unguents receiving into their composition hydrargyrum.