A device that is used to deflect daylight downward as it streams through a window.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
1. In a wall, an aperture whose sides have been cut back and/or whose underside has been sloped downward so as to admit a greater amount of light to the interior of the room.
2. A skylight.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.