| 释义 |
〔litmus〕A water-soluble blue powder derived from certain lichens that changes to red with increasing acidity and to blue with increasing basicity.石蕊：取自地衣的一种可溶于水的蓝色粉末，可随酸性增大而变红，随碱度增大而变蓝〔orchil〕Any of several lichens, chiefly of the generaRoccella and Lecanora, from which a dye is obtained. 染料衣：几种紫色石蕊地衣中的一种，主要是圆室藻属 和 茶渍属， 通过它可提取染料 〔fucus〕Latin fūcus [seaweed, orchil] 拉丁语 fūcus [海藻，海石蕊紫] |