different between purpurin vs porporino

English

purpurin (countable and uncountable, plural purpurins)

A red anthraquinone dye, extracted from madder, that is used as a biological stain
(biochemistry) A protein of the lipocalin family
(historical) A brownish or deep red decorative glass used in ancient times

From Italian.

porporino (uncountable)

A composition of mercury, tin, and sulphur, forming a yellow powder, sometimes used by mediaeval artists as a cheaper alternative to gold.
(Can we find and add a quotation of Fairholt to this entry?)

porporino (feminine porporina, masculine plural porporini, feminine plural porporine)

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