The integument of animal; the skin.

n. An adhesive skin patch used to apply medication.

referring to skin, theredore bark ("leucodermis" = white- bark")

A generic term used to refer to a substance absorbed transdermally (i.e. through the skin) in a manner similar to that of a Nicorette Patch. Case uses recreational derms several times throughout the book. At another point, derms are used to administer an anaesthetic substance.