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
例句
用作名词 (n.)
The old, empty exoskeleton is called an exuvia. 脱去的旧的空的外骨骼被称为蜕。
The exoskeleton of insects is largely made of protein and chitin. 昆虫的外骨骼大部分是由蛋白质和几丁质组成的.