A dormer that has a semi-cylindrical-shaped roof; the head of the window in the dormer may be either rounded or flat.See also: Dormer
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
A dormer having an approximately semicylindrical roof; the head of the upper sash in the dormer may be either round-topped or flat-topped.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.