Permitting the passage of substances ( e.g., liquids, gases, heat), as through a membrane or other structure. SYN: pervious. [L. permeabilis (see permeate)]
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per·me·able 'pər-mē-ə-bəl adj capable of being permeated esp having pores or openings that permit liquids or gases to pass through <a \permeable membrane>
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per·me·a·ble (purґme-ə-bəl) [L. per through + meare to pass] not impassable; allowing passage of a substance. Called also pervious.Medical dictionary. 2011.