Zoology 【动】
1
- (of a young bird or other animal) hatched or born in an undeveloped state and requiring care and feeding by the parents（幼鸟等）晚成雏的。亦称NIDICOLOUS. 常与PRECOCIAL相对。
1.1
- (of a particular species) having such young（某特定物种）养育晚成雏的。
- an altricial bird晚成雏鸟。
词源
late 19th cent.: from Latin altrix, altric-, feminine of altor 'nourisher'， from alere 'nourish'.