名詞 chitin:

1. a tough semitransparent horny substance; the principal component of the exoskeletons of arthropods and the cell walls of certain fungi

chi.tin

n.（名詞）
A tough, protective, semitransparent substance, primarily a nitrogen-containing polysaccharide, forming the principal component of arthropod exoskeletons and the cell walls of certain fungi.
幾丁質(zhì)：一種基本上為含氮多聚糖的保護(hù)性半透明堅(jiān)硬物質(zhì)，是節(jié)肢動(dòng)物外骨骼和某些真菌細(xì)胞壁的主要組成部分

來源：
French chitine
法語 chitine
from New Latin chitôn [mollusk]
源自 現(xiàn)代拉丁語 chitôn [軟體動(dòng)物]
from Greek khitôn [chiton] * see chiton
源自 希臘語 khitôn [石鱉] *參見 chiton

【引伸】
chi.tinous
adj.（形容詞）