A gutter which is constructed in such a manner that it cannot be seen; also called a hidden gutter.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
A gutter built into the eaves of a roof, usually metal-lined.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.