Read Edit View history 蓼蓝 liǎolán polygonum tinctorium Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 蓼蓝/蓼藍 · liǎolán · polygonum tinctorium 2026/03/04 蓼蓝 / 蓼藍 liǎolán polygonum tinctorium a species of plant in the buckwheat family used to produce natural blue dye 蓼蓝的叶子在古代常被用来提取蓝色染料。 noun created sense Mar 4, 2026, 02:25 AM