Ornith.
the plumage of a bird that, once attained, does not change significantly in color or pattern for the rest of the bird's life.
Ornith.
the plumage of a bird that, once attained, does not change significantly in color or pattern for the rest of the bird's life.
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012