Integument :: Integument (n.) That which naturally invests or covers another thing, as the testa or the tegmen of a seed; specifically (Anat.), a covering which invests the body, as the skin, or a membrane that invests a particular..
Integumentary :: Integumentary (n.) Belonging to, or composed of, integuments..
Integumentation :: Integumentation (n.) The act or process of covering with integuments; the state or manner of being thus covered.