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 ]
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 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012