柯林斯词典chitin /ˈkaɪtɪn/ 1. N a polysaccharide that is the principal component of the exoskeletons of arthropods and of the bodies of fungi 幾丁質 返回 chitin剑桥词典a hard substance in the outer shell of insects and animals such as shrimp and lobster , and in the cell walls of some fungi 殼質（某些生物躰表堅硬的保護層，如崑蟲、蝦，龍蝦的外殼和部分真菌的細胞壁） 返回 chitin