leukomethylene blueWiktionary 原文英美构词拆解leuko-前缀+methylene blue词干leuko-white · colourless词源说明From leuko- + methylene blue.释义名词noun1(organic chemistry) The phenothiazine dye 3-N,3-N,7-N,7-N-tetramethyl-10H-phenothiazine-3,7-diamine