tomium

n.[鸟]啮喙

硬骨质物质；硬质组织

名词

1. The beak of a bird is made of keratinized tomium.
鸟嘴由角质化的硬骨质组织构成。

2. The tomium of a turtle helps it bite through tough prey.
龟嘴的硬质组织帮助它咬碎坚硬的猎物。