egg tooth


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egg tooth

n.
A hard toothlike projection on the beak of an embryonic bird or the snout of an embryonic reptile that is used to break through the eggshell upon hatching and that later falls off or is absorbed.

egg tooth

n
(Zoology) (in embryo birds and reptiles) a temporary tooth or (in birds) projection of the beak used for piercing the eggshell

egg′ tooth`


n.
a calcareous prominence at the tip of the beak or upper jaw of an embryonic bird or reptile, used to break through the eggshell at hatching.
[1890–95]

egg tooth

A hard, tooth-like projection from the beak of embryonic birds, or from the upper jaw of embryonic reptiles, that is used to cut the egg membrane and shell upon hatching and that later falls off.
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References in periodicals archive ?
Hatchlings use a small egg tooth to break out of the shells--generally around mid-August--and then dig their way out of the nests.
Birds and many reptiles slice through their shell with a spiky point on their snout or beak called an egg tooth.
This baby Florida box turtle still has its egg tooth, the little white bump on the tip of its beak.