moldboard

[mohld-bawrd, -bohrd]

noun

the curved metal plate in a plow that turns over the earth from the furrow.

a large blade mounted on the front of a bulldozer to push loose earth.

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. 2019

Examples from the Web for moldboard

Historical Examples of moldboard

The moldboard was rough and the curves of no two were alike.
The Age of Invention
Holland Thompson
This shows that the soil is slipping off the moldboard easily.
Farm Mechanics
Herbert A. Shearer
The moldboard of this plow is made of wood and covered with thick pieces of iron.
Agricultural Implements and Machines in the Collection of the National Museum of History and Technology
John T. Schlebecker
This sod-turning plow has its landside, moldboard, and colter in separate pieces.
Agricultural Implements and Machines in the Collection of the National Museum of History and Technology
John T. Schlebecker
The share and point are in one piece; and the moldboard is one piece.
Agricultural Implements and Machines in the Collection of the National Museum of History and Technology
John T. Schlebecker

British Dictionary definitions for moldboard

moldboard

noun

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