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2017 Word of the Year

castellated beam

noun
1.
a rolled metal beam the web of which is first divided by a lengthwise zigzag cut, then welded together so as to join the peaks of both halves, thus increasing its depth and strength.
Origin of castellated beam
1670-1680
First recorded in 1670-80
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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