Water parting. Phys. Geog. A summit from the opposite sides of which rain waters flow to different streams; a line separating the drainage districts of two streams or coasts; a divide; a watershed.

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 Wa·ter·shed n.
 1. The whole region or extent of country which contributes to the supply of a river or lake.
 2. The line of division between two adjacent rivers or lakes with respect to the flow of water by natural channels into them; the natural boundary of a basin; -- called also divide and water parting.

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 Di·vide, n. A dividing ridge of land between the tributaries of two streams; also called watershed and water parting.  A divide on either side of which the waters drain into two different oceans is called a continental divide.

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 water parting
      n : a ridge of land that separates two adjacent river systems
          [syn: watershed, divide]