Definition of "orpin" [or•pin]

• A yellow pigment of various degrees of intensity, sometimes approaching red. (noun)
• The orpine. (noun)

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• ""Fourthly, that the first of these liquors in a mixture of the alkali and igneous parts of quick-lime with the sulphureous substance of arsenick; for the orpin is a sort of arsenick, as I said before."
• ""This last effect does likewise proceed from the defacing liquor; for because upon the digestion of quicklime and orpin, it is a thing impossible for some of the particles will exalt, stop the vessel as close as you will; the air impregnated with these little bodies does mix with, and alter the inks, insomuch that the visible ink does thereby become the less black, and the invisible ink does also acquire a little blackness.""
• "In choral ser - vice when I liear — the pcalini; orpin blow To llio full-toiccil clioir beiuw I: i srr\icc liiL, h: inJ aiilhcm clear/"