Wordnet 3.0
NOUN (2)
1. 
 a covering that is intend to protect from damage or injury; 
- Example: "they had no protection from the fallout"- Example: "wax provided protection for the floors"[syn: protective covering, protective cover, protection]
2.  the tough natural covering of some organisms; 
WordNet (r) 3.0 (2006):
protective covering
    n 1: a covering that is intend to protect from damage or injury;
         "they had no protection from the fallout"; "wax provided
         protection for the floors" [syn: protective covering,
         protective cover, protection]
    2: the tough natural covering of some organisms