leucocyanideWiktionary 原文构词拆分leuco-前缀Latinized Alternative spelling of leuko- (“white; colourless; leucocyte”).+cyanide词根/词干词源说明From leuco- + cyanide.释义（英文）名词 Noun(organic chemistry) Any of various colourless cyanide compounds that are readily converted to coloured forms, most often by exposure to light.