The Collaborative International Dictionary of English v.0.48:

Hemlock \Hem"lock\, n. [OE. hemeluc, humloc, AS. hemlic,
   hymlic.]
   1. (Bot.) The name of several poisonous umbelliferous herbs
      having finely cut leaves and small white flowers, as the
      Cicuta maculata, Cicuta bulbifera, and Cicuta
      virosa, and the Conium maculatum. See Conium.
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   Note: The potion of hemlock administered to Socrates is by
         some thought to have been a decoction of Cicuta
         virosa, or water hemlock, by others, of Conium
         maculatum.
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   2. (Bot.) An evergreen tree common in North America (Abies
      Canadensis or Tsuga Canadensis); hemlock spruce.
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            The murmuring pines and the hemlocks. --Longfellow.
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   3. The wood or timber of the hemlock tree.
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   Ground hemlock, or Dwarf hemlock. See under Ground.
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The Collaborative International Dictionary of English v.0.48:

Pitch \Pitch\, n. [OE. pich, AS. pic, L. pix; akin to Gr. ?.]
   1. A thick, black, lustrous, and sticky substance obtained by
      boiling down tar. It is used in calking the seams of
      ships; also in coating rope, canvas, wood, ironwork, etc.,
      to preserve them.
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            He that toucheth pitch shall be defiled therewith.
                                                  --Ecclus.
                                                  xiii. 1.
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   2. (Geol.) See Pitchstone.
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   Amboyna pitch, the resin of Dammara australis. See
      Kauri.

   Burgundy pitch. See under Burgundy.

   Canada pitch, the resinous exudation of the hemlock tree
      (Abies Canadensis); hemlock gum.

   Jew's pitch, bitumen.

   Mineral pitch. See Bitumen and Asphalt.

   Pitch coal (Min.), bituminous coal.

   Pitch peat (Min.), a black homogeneous peat, with a waxy
      luster.

   Pitch pine (Bot.), any one of several species of pine,
      yielding pitch, esp. the Pinus rigida of North America.
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