1. The earth-board or mould-board of a plow.
1649. Blithe, Eng. Improv. Impr. (1653), 190. The Shield-board, some call Breast-board, or Earth-board, or Furrow-board.
1725. Bradley, Fam. Dict., s.v. Plough, The Earth board, Mould board, Breast board, Throw board.
2. Mining. ‘Planking placed between the last set of timbers and the face of a gangway or heading, in quicksand or loose ground’ (Raymond).
3. Rope-making. A loaded carriage to which the yarn-ends are attached at the foot of the rope-walk.
