The Collaborative International Dictionary of English v.0.48:

Slag \Slag\ (sl[a^]g), n. [Sw. slagg, or LG. slacke, whence G.
   schlacke; originally, perhaps, the splinters struck off from
   the metal by hammering. See Slay, v. t.]
   1. The dross, or recrement, of a metal; also, vitrified
      cinders.
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   2. The scoria of a volcano.
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   3. (Metal.) A product of smelting, containing, mostly as
      silicates, the substances not sought to be produced as
      matte or metal, and having a lower specific gravity than
      the latter; -- called also, esp. in iron smelting,
      cinder. The slag of iron blast furnaces is essentially
      silicate of calcium, magnesium, and aluminium; that of
      lead and copper smelting furnaces contains iron.
      [Webster 1913 Suppl.]

   Slag furnace, or Slag hearth (Metal.), a furnace, or
      hearth, for extracting lead from slags or poor ore.

   Slag wool, mineral wool. See under Mineral.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Wool \Wool\ (w[oo^]l), n. [OE. wolle, wulle, AS. wull; akin to
   D. wol, OHG. wolla, G. wolle, Icel. & Sw. ull, Dan. uld,
   Goth, wulla, Lith. vilna, Russ. volna, L. vellus, Skr.
   [=u]r[.n][=a] wool, v[.r] to cover. [root]146, 287. Cf.
   Flannel, Velvet.]
   [1913 Webster]
   1. The soft and curled, or crisped, species of hair which
      grows on sheep and some other animals, and which in
      fineness sometimes approaches to fur; -- chiefly applied
      to the fleecy coat of the sheep, which constitutes a most
      essential material of clothing in all cold and temperate
      climates.
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   Note: Wool consists essentially of keratin.
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   2. Short, thick hair, especially when crisped or curled.
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            Wool of bat and tongue of dog.        --Shak.
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   3. (Bot.) A sort of pubescence, or a clothing of dense,
      curling hairs on the surface of certain plants.
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   Dead pulled wool, wool pulled from a carcass.

   Mineral wool. See under Mineral.

   Philosopher's wool. (Chem.) See Zinc oxide, under Zinc.


   Pulled wool, wool pulled from a pelt, or undressed hide.

   Slag wool. Same as Mineral wool, under Mineral.

   Wool ball, a ball or mass of wool.

   Wool burler, one who removes little burs, knots, or
      extraneous matter, from wool, or the surface of woolen
      cloth.

   Wool comber.
      (a) One whose occupation is to comb wool.
      (b) A machine for combing wool.

   Wool grass (Bot.), a kind of bulrush (Scirpus Eriophorum)
      with numerous clustered woolly spikes.

   Wool scribbler. See Woolen scribbler, under Woolen, a.


   Wool sorter's disease (Med.), a disease, resembling
      malignant pustule, occurring among those who handle the
      wool of goats and sheep.

   Wool staple, a city or town where wool used to be brought
      to the king's staple for sale. [Eng.]

   Wool stapler.
      (a) One who deals in wool.
      (b) One who sorts wool according to its staple, or its
          adaptation to different manufacturing purposes.

   Wool winder, a person employed to wind, or make up, wool
      into bundles to be packed for sale.
      [1913 Webster]