名詞 exoskeleton:

1. the exterior protective or supporting structure or shell of many animals (especially invertebrates) including bony or horny parts such as nails or scales or hoofs

ex.o.skel.e.ton

n.（名詞）
A hard outer structure, such as the shell of an insect or a crustacean, that provides protection or support for an organism.
外骨骼：為生物提供保護(hù)或支持的堅(jiān)硬的外部結(jié)構(gòu)，象甲殼類動(dòng)物或昆蟲的骨盤

【引伸】
ex.oskel.etal