うぶげ
downy hair; down; vellus hair; peach fuzz
Also written うぶ毛、生毛
Noun
孵化ふか後ごまもないヒナは、産毛うぶげが濡ぬれていますが、２時間じかんもすると乾かわいてフワフワになります。
The down of chicks that have just hatched is damp, but after two hours it dries out and becomes fluffy.