egg laying tooth破卵齿
Hatching spine Egg tooth Egg-burster破壳器
Egg tooth Egg-burster hatching spine破壳器
Egg-burster Egg tooth Hatching spine破壳器
N（名词） (in embryo birds and reptiles) a temporary tooth or (in birds) projection of the beak used for piercing the eggshell (在胚胎中的鸟类和爬行动物的)破卵齿