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The scaling off of a bone, a rock, or a mineral, etc.; the state of being exfoliated.

The separation or shedding of the cuticle or epidermis in the form of flakes or scales; exfoliation, as of bones.

Having the power of causing exfoliation. -- n.

powder, etc. See under Atlas, Baking, etc. -- Powder down (Zoöl.), the peculiar dust, or exfoliation, of powder-down feathers. -- Powder-down feather (Zoöl.), one of a peculiar kind of modified feathers which sometimes form patches on certain parts of some birds. They have a greasy texture and a scaly exfoliation. -…