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buttstrap

[buht-strap]
noun
  1. (in metal construction) a plate which overlaps and fastens two pieces butted together.
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verb (used with object), butt·strapped, butt·strap·ping.
  1. to unite with a buttstrap or buttstraps.
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Origin of buttstrap

First recorded in 1865–70; butt1 + strap
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018