柯林斯詞典lignin /?l?ɡn?n/ 1. N a complex polymer occurring in certain plant cell walls making the plant rigid 木質(zhì)素; 出現(xiàn)在植物細(xì)胞壁中，能使植物僵硬的復(fù)雜的聚合物 返回 lignin劍橋詞典a substance found in the edges of some plant cells that makes the plant hard like wood 木質(zhì)素 返回 lignin