The Collaborative International Dictionary of English v.0.48:

Lamb \Lamb\, n. [AS. lamb; akin to D. & Dan. lam, G. & Sw. lamm,
   OS., Goth., & Icel. lamb.]
   1. (Zool.) The young of the sheep.
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   2. Any person who is as innocent or gentle as a lamb.
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   3. A simple, unsophisticated person; in the cant of the Stock
      Exchange, one who ignorantly speculates and is victimized.
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   Lamb of God, The Lamb (Script.), the Jesus Christ, in
      allusion to the paschal lamb.
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            The twelve apostles of the Lamb.      --Rev. xxi.
                                                  14.
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            Behold the Lamb of God, which taketh away the sin of
            the world.                            --John i. 29.

   Lamb's lettuce (Bot.), an annual plant with small obovate
      leaves (Valerianella olitoria), often used as a salad;
      corn salad. [Written also lamb lettuce.]

   Lamb's tongue, a carpenter's plane with a deep narrow bit,
      for making curved grooves. --Knight.

   Lamb's wool.
      (a) The wool of a lamb.
      (b) Ale mixed with the pulp of roasted apples; -- probably
          from the resemblance of the pulp of roasted apples to
          lamb's wool. [Obs.] --Goldsmith.
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The Collaborative International Dictionary of English v.0.48:

Wassail \Was"sail\, n. [AS. wes h[=a]l (or an equivalent form in
   another dialect) be in health, which was the form of drinking
   a health. The form wes is imperative. See Was, and
   Whole.]
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   1. An ancient expression of good wishes on a festive
      occasion, especially in drinking to some one.
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            Geoffrey of Monmouth relates, on the authority of
            Walter Calenius, that this lady [Rowena], the
            daughter of Hengist, knelt down on the approach of
            the king, and, presenting him with a cup of wine,
            exclaimed, Lord king waes heil, that is, literally,
            Health be to you.                     --N. Drake.
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   2. An occasion on which such good wishes are expressed in
      drinking; a drinking bout; a carouse. "In merry wassail he
      . . . peals his loud song." --Sir W. Scott.
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            The king doth wake to-night and takes his rouse,
            Keeps wassail.                        --Shak.
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            The victors abandoned themselves to feasting and
            wassail.                              --Prescott.
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   3. The liquor used for a wassail; esp., a beverage formerly
      much used in England at Christmas and other festivals,
      made of ale (or wine) flavored with spices, sugar, toast,
      roasted apples, etc.; -- called also lamb's wool.
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            A jolly wassail bowl,
            A wassail of good ale.                --Old Song.
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   4. A festive or drinking song or glee. [Obs.]
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            Have you done your wassail! 'T is a handsome, drowsy
            ditty, I'll assure you.               --Beau. & Fl.
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