Soffit

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soffit

[′säf·ət]
(civil engineering)
The underside of a horizontal structural member, such as a beam or a slab.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Soffit

A ceiling or exposed underside surface of entablatures, archways, balconies, beams, lintels or columns.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Soffit

 

the often decorated underside of a ceiling beam, arch, projecting cornice or some other architectural part. The Russian term sofit also refers to the representation of any part of a ceiling in a reflected ceiling plan.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

soffit

soffit of an arch and of a lintel, S
The exposed undersurface of any overhead component of a building, such as an arch, balcony, beam, cornice, lintel, or vault.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.