moldboard

[ mohld-bawrd, -bohrd ]

/ ˈmoʊldˌbɔrd, -ˌboʊrd /

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

This plow may be set to run deeper than moldboard plows go, and it mixes well all the soil that it turns.

Crops and Methods for Soil Improvement |Alva Agee
The disks, set at an angle, cast less furrow than a moldboard plow.

Agricultural Implements and Machines in the Collection of the National Museum of History and Technology |John T. Schlebecker
The model has a share, standard, and moldboard of metal with a gauge wheel on the beam.

Agricultural Implements and Machines in the Collection of the National Museum of History and Technology |John T. Schlebecker
Its moldboard was based on a design worked out by Thomas Jefferson.

Agricultural Implements and Machines in the Collection of the National Museum of History and Technology |John T. Schlebecker

The moldboard of a plow must be smooth in order to properly shed the earth freely to make an easy turn-over.

Farm Mechanics |Herbert A. Shearer

moldboard

/ (ˈməʊldˌbɔːd) /

the US spelling of mouldboard