柯林斯詞典precocial /pr??k????l/ →compare altricial 1. ADJ (of the young of some species of birds after hatching) covered with down, having open eyes, and capable of leaving the nest within a few days of hatching (孵化后的一些種類的雛鳥)早成的2. N a precocial bird 早成鳥 返回 precocial