The Collaborative International Dictionary of English v.0.48:

Plowman \Plow"man\, Ploughman \Plough"man\, n.; pl. -men.
   1. One who plows, or who holds and guides a plow; hence, a
      husbandman. --Chaucer. Macaulay.
      [1913 Webster]

   2. A rustic; a countryman; a field laborer.
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   Plowman's spikenard (Bot.), a European composite weed
      (Conyza squarrosa), having fragrant roots. --Dr. Prior.
      [1913 Webster] Plowpoint