noun Building Trades Informal.
a steel bar or rod used to reinforce concrete.
Also, re-bar.

1960–65, Americanism; re(inforcing) bar Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To rebar
American Heritage
Abbreviations & Acronyms
reinforcing bar
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
The steel in the buildings, even the rebar in the reinforced concrete, will be
  sent to a steel recycling facility.
As the dumpster was slowly emptied, conservators found tattered clothing mixed
  in with rebar and concrete.
Others are heated and cut into fence posts, rebar, or even bed frames.
Fill the cells with mortar and set the rebar in the mortar.
Image for rebar
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