fal·low /ˈfæ(ˌ)lo/
  休耕地(a.)休耕的,淡棕色的
  Fal·low a.
  1. Pale red or pale yellow; as, a fallow deer or greyhound.
  2.  Left untilled or unsowed after plowing; uncultivated; as, fallow ground.
  Fallow chat, Fallow finch Zool., a small European bird, the wheatear (Saxicola œnanthe). See Wheatear.
  Fal·low, n.
  1. Plowed land. [Obs.]
     Who . . . pricketh his blind horse over the fallows.   --Chaucer.
  2. Land that has lain a year or more untilled or unseeded; land plowed without being sowed for the season.
     The plowing of fallows is a benefit to land.   --Mortimer.
  3. The plowing or tilling of land, without sowing it for a season; as, summer fallow, properly conducted, has ever been found a sure method of destroying weeds.
     Be a complete summer fallow, land is rendered tender and mellow. The fallow gives it a better tilth than can be given by a fallow crop.   --Sinclair.
  Fallow crop, the crop taken from a green fallow. [Eng.]
  Green fallow, fallow whereby land is rendered mellow and clean from weeds, by cultivating some green crop, as turnips, potatoes, etc. [Eng.]
  Fal·low v. t. [imp. & p. p. Fallowed p. pr. & vb. n. Fallowing.]  To plow, harrow, and break up, as land, without seeding, for the purpose of destroying weeds and insects, and rendering it mellow; as, it is profitable to fallow cold, strong, clayey land.
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  fallow
       adj 1: left unplowed and unseeded during a growing season; "fallow
              farmland"
       2: undeveloped but potentially useful; "a fallow gold market"
       n : cultivated land that is not seeded for one or more growing
           seasons