From WebRef.org
Jump to: navigation, search
  • membranes lining or covering a surface, including secretory glands
    Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby
  • The surface layer of the skin or the lining layer of the intestinal mucosa or air passages of the lungs.
    Source: Biotechnology Glossary