screed
[skrēd] (building construction)
A long, narrow strip of plaster placed at intervals on a surface as a guide for the thickness of plaster to be applied.
(civil engineering)
A straight-edged wood or metal template, fixed temporarily to a surface as a guide when plastering or concreting.
An oscillating metal bar mounted on wheels and spanning a freshly placed road slab, used to strike off and smooth the surface.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
Screed
A wooden or metal guide for leveling plaster or concrete, typically placed along the edge of the work at the desired level.

Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
screed
1. Firmly established grade strips or side forms for unformed concrete which will guide the
strikeoff in producing the desired plane or shape; Also called
screed rail. 2. A tool to strike off the concrete surface.
3. A long, narrow strip of plaster, applied at intervals on a surface to be plastered; carefully leveled and trued to act as a guide for plastering to the specified thickness.
4. A layer of mortar laid on concrete, usually to provide a uniform, level surface.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.