louver

Definitions

Construction

  • A framed opening in a wall, fitted with fixed or movable slanted slats. Though commonly used in doors and windows, louvers are especially useful in ventilating systems at air intake and exhaust locations.

Electronics

  • A slanted opening, or an opening consisting of multiple parallel slats. Used, for instance, to help dissipate heat, or to protect tweeters while allowing sound to pass freely.
http://www.dictionarycentral.com/definition/louver.html