晚成鸟

Altrices \Al*tri"ces\, n. pl. [L., nourishes, pl. of altrix.]
(Zo["o]l.)
Nursers, -- a term applied to those birds whose young are
hatched in a very immature and helpless condition, so as to
require the care of their parents for some time; -- opposed
to {pr[ae]coces}.