A growing feather still enclosed in its horny sheath, especially one just emerging through the skin.
A growing feather still enclosed in its horny sheath, especially one just emerging through the skin.
（鸟类的）新生毛一种裹在角鞘中的新生毛，特别是刚刚冒出皮肤外的羽毛
A growing feather still enclosed in its horny sheath, especially one just emerging through the skin.
（鸟类的）新生毛一种裹在角鞘中的新生毛，特别是刚刚冒出皮肤外的羽毛