purpurate

& s. [PURPURA.] A. As adj .: Of or pertaining to purpura. B. As substantive: Chem. ( pl .): Salts of purpuric acid. purpurate of ammonia, s. Chem. C . Murexide. Prepared by boiling four parts of uramil, with three parts of mercuric oxide and water, and filtering while hot. On cooling it separates in the form of square prisms, which by reflected light exhibit a metallic-green luster; by transmitted light, a deep red color. It is insoluble in alcohol and ether, difficultly soluble in cold, but very soluble in boiling water. It was formerly much used in dyeing, but is now superseded by rosaniline. pür-püre, s. & a. [Lat. purpura =purple.] A. As substantive: Her.: The term used for purple. It is represented in engraving by diagonal lines from the sinister base of the shield to the dexter chief. *B. As adj .: Purple. "Overclad with blood in purpure hew." Hudson: Judith, v. 342. Purpure.