Moldboard \Mold"board`\, Mouldboard \Mould"board`\, n. 1. A curved plate of iron (originally of wood) back of the share of a plow, which turns over the earth in plowing. 2. (Founding) A follow board.
mouldboard n : wedge formed by the curved part of a steel plow blade that turns the furrow [syn: {moldboard}]