Moldboard (noun)

1. A type of plow that has a curved metal blade that is used to turn over and break up soil.
2. A metal or wooden board that is used to shape soil.

Origin:

From the word "mold" meaning to shape and "board" meaning a flat piece of wood or other material.

Examples:

1. The farmer used a moldboard plow to prepare the field for planting.
2. The moldboard on the plow was worn and needed to be replaced.
3. The moldboard is an essential part of the plow and helps to turn the soil.
4. The use of moldboard plows increased crop yields by breaking up the soil.
5. The moldboard was adjusted to make the plowing more effective.