\Per"me*a*ble\, a. [L. permeabilis: cf. F.
perm['e]able. See {Permeate}.]
Capable of being permeated, or passed through; yielding
passage; passable; penetrable; -- used especially of
substances which allow the passage of fluids; as, wood is
permeable to oil; glass is permeable to light. --I. Taylor.