[f. EARTH sb.1 (or perh. sb.2) + BOARD.] The mould-board of a plow.

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1649.  Blithe, Eng. Improv. Impr. (1653), 190. The Shield-board, some call Breast-board, or Earth-board, or Furrow-board.

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1765.  Univ. Mag., XXXVII. 33/2. The plat, or earth-board, turned most of the carrots out of the ground.

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1884.  Longm. Mag., Feb., 403. The ‘hardy rustic’ still goes into the woods and seeks for an elm … for the earth-boards.

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