The Collaborative International Dictionary of English v.0.48:

Salt \Salt\, a. [Compar. Salter; superl. Saltest.] [AS.
   sealt, salt. See Salt, n.]
   1. Of or relating to salt; abounding in, or containing, salt;
      prepared or preserved with, or tasting of, salt; salted;
      as, salt beef; salt water. "Salt tears." --Chaucer.
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   2. Overflowed with, or growing in, salt water; as, a salt
      marsh; salt grass.
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   3. Fig.: Bitter; sharp; pungent.
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            I have a salt and sorry rheum offends me. --Shak.
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   4. Fig.: Salacious; lecherous; lustful. --Shak.
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   Salt acid (Chem.), hydrochloric acid.

   Salt block, an apparatus for evaporating brine; a salt
      factory. --Knight.

   Salt bottom, a flat piece of ground covered with saline
      efflorescences. [Western U.S.] --Bartlett.

   Salt cake (Chem.), the white caked mass, consisting of
      sodium sulphate, which is obtained as the product of the
      first stage in the manufacture of soda, according to
      Leblanc's process.

   Salt fish.
      (a) Salted fish, especially cod, haddock, and similar
          fishes that have been salted and dried for food.
      (b) A marine fish.

   Salt garden, an arrangement for the natural evaporation of
      sea water for the production of salt, employing large
      shallow basins excavated near the seashore.

   Salt gauge, an instrument used to test the strength of
      brine; a salimeter.

   Salt horse, salted beef. [Slang]

   Salt junk, hard salt beef for use at sea. [Slang]

   Salt lick. See Lick, n.

   Salt marsh, grass land subject to the overflow of salt
      water.

   Salt-marsh caterpillar (Zool.), an American bombycid moth
      (Spilosoma acraea which is very destructive to the
      salt-marsh grasses and to other crops. Called also woolly
      bear. See Illust. under Moth, Pupa, and Woolly
      bear, under Woolly.

   Salt-marsh fleabane (Bot.), a strong-scented composite herb
      (Pluchea camphorata) with rayless purplish heads,
      growing in salt marshes.

   Salt-marsh hen (Zool.), the clapper rail. See under Rail.


   Salt-marsh terrapin (Zool.), the diamond-back.

   Salt mine, a mine where rock salt is obtained.

   Salt pan.
      (a) A large pan used for making salt by evaporation; also,
          a shallow basin in the ground where salt water is
          evaporated by the heat of the sun.
      (b) pl. Salt works.

   Salt pit, a pit where salt is obtained or made.

   Salt rising, a kind of yeast in which common salt is a
      principal ingredient. [U.S.]

   Salt raker, one who collects salt in natural salt ponds, or
      inclosures from the sea.

   Salt sedative (Chem.), boracic acid. [Obs.]

   Salt spring, a spring of salt water.

   Salt tree (Bot.), a small leguminous tree (Halimodendron
      argenteum) growing in the salt plains of the Caspian
      region and in Siberia.

   Salt water, water impregnated with salt, as that of the
      ocean and of certain seas and lakes; sometimes, also,
      tears.
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            Mine eyes are full of tears, I can not see;
            And yet salt water blinds them not so much
            But they can see a sort of traitors here. --Shak.
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   Salt-water sailor, an ocean mariner.

   Salt-water tailor. (Zool.) See Bluefish.
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WordNet (r) 3.0 (2006):

salt mine
    n 1: a mine where salt is dug
    2: a job involving drudgery and confinement [syn: treadmill,
       salt mine]