| polychrome | <chemistry> Esculin; so called in allusion to its fluorescent solutions. Origin: Poly- + Gr. Colour. Source: Websters Dictionary (01 Mar 1998) |
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| polychrome methylene blue | An alkaline solution of methylene blue which undergoes progressive oxidative demethylation with aging (ripening) to produce a mixture of methylene blue, azures, and methylene violet; boiling with sodium carbonate or other oxidizing agents accomplishes this result quickly, although it is not as highly regarded. (05 Mar 2000) |