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moldboard

[mohld-bawrd, -bohrd]
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noun
  1. the curved metal plate in a plow that turns over the earth from the furrow.
  2. a large blade mounted on the front of a bulldozer to push loose earth.
  3. a board forming one side or surface of a mold for concrete.

Origin of moldboard

1300–50; replacing earlier moldbred, Middle English mold bred. See mold3 (for defs 1, 2), mold1 (for def 3), board
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for moldboard

moldboard

noun
  1. the US spelling of mouldboard
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012