The Collaborative International Dictionary of English v.0.48:

Slime \Slime\ (sl[imac]m), n. [OE. slim, AS. sl[imac]m; akin to
   D. slijm, G. schleim, MHG. sl[imac]men to make smooth, Icel.
   sl[imac]m slime, Dan. sliim; cf. L. limare to file, polish,
   levis smooth, Gr. ???; or cf. L. limus mud.]
   1. Soft, moist earth or clay, having an adhesive quality;
      viscous mud.
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            As it [Nilus] ebbs, the seedsman
            Upon the slime and ooze scatters his grain. --Shak.
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   2. Any mucilaginous substance; any substance of a dirty
      nature, that is moist, soft, and adhesive.
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   3. (Script.) Bitumen. [Archaic]
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            Slime had they for mortar.            --Gen. xi. 3.
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   4. pl. (Mining) Mud containing metallic ore, obtained in the
      preparatory dressing. --Pryce.
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   5. (Physiol.) A mucuslike substance which exudes from the
      bodies of certain animals. --Goldsmith.
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   Slime eel. (Zool.) See 1st Hag, 4.

   Slime pit, a pit for the collection of slime or bitumen.
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The Collaborative International Dictionary of English v.0.48:

Slime \Slime\ (sl[imac]m), v. t. [imp. & p. p. Slimed
   (sl[imac]md); p. pr. & vb. n. Sliming.]
   To smear with slime. --Tennyson.
   [1913 Webster] slime mold

WordNet (r) 3.0 (2006):

slime
    n 1: any thick, viscous matter [syn: sludge, slime, goo,
         goop, gook, guck, gunk, muck, ooze]
    v 1: cover or stain with slime; "The snake slimed his victim"

Moby Thesaurus II by Grady Ward, 1.0:

41 Moby Thesaurus words for "slime":
   carrion, clay, corruption, dandruff, decay, excrement, filth,
   foul matter, furfur, gangrene, glop, gumbo, gunk, mess, mire, muck,
   mucus, mud, obscenity, ooze, ordure, pus, putrid matter, rot, scum,
   scurf, scuz, slab, slip, slob, slop, slosh, sludge, slum, slush,
   smut, snot, sordes, splosh, squash, swill



Easton's 1897 Bible Dictionary:

Slime
   (Gen. 11:3; LXX., "asphalt;" R.V. marg., "bitumen"). The vale of
   Siddim was full of slime pits (14:10). Jochebed daubed the "ark
   of bulrushes" with slime (Ex. 2:3). (See PITCH.)