To cast the hair, feathers, skin, etc.

脱毛；换羽；蜕皮等。

To shed, as the skin, hair, horns, etc.

脱皮；换皮；脱角等。

The shedding of hair, feathers, etc., or the season when such shedding takes place.

脱毛；换羽；脱毛、换羽之季节。