Egg tooth

A red-eared slider hatchling with an egg tooth.

In some egg-laying animals, the egg tooth is a small, sharp, cranial protuberance used by offspring to break or tear through the egg's surface during hatching. It is present in most birds and reptiles, and similar structures exist in monotremes, Eleutherodactyl frogs, and spiders.

单词	Egg tooth
释义	Egg tooth 英语百科 Egg tooth In some egg-laying animals, the egg tooth is a small, sharp, cranial protuberance used by offspring to break or tear through the egg's surface during hatching. It is present in most birds and reptiles, and similar structures exist in monotremes, Eleutherodactyl frogs, and spiders.
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