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any recessed usually vaulted area, as in a garden wall
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
A small recessed space, connected to or opening directly into a larger room.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
A recessed part of a room.
A small room that opens into a larger one.
An arched opening in a wall.
A large niche formed by a stream in a face of horizontal strata.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
A small recessed space, opening directly into a larger room.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.