The Collaborative International Dictionary of English v.0.48:

Hollow \Hol"low\, a. [OE. holow, holgh, holf, AS. holh a hollow,
   hole. Cf. Hole.]
   1. Having an empty space or cavity, natural or artificial,
      within a solid substance; not solid; excavated in the
      interior; as, a hollow tree; a hollow sphere.
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            Hollow with boards shalt thou make it. --Ex. xxvii.
                                                  8.
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   2. Depressed; concave; gaunt; sunken.
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            With hollow eye and wrinkled brow.    --Shak.
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   3. Reverberated from a cavity, or resembling such a sound;
      deep; muffled; as, a hollow roar. --Dryden.
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   4. Not sincere or faithful; false; deceitful; not sound; as,
      a hollow heart; a hollow friend. --Milton.
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   Hollow newel (Arch.), an opening in the center of a winding
      staircase in place of a newel post, the stairs being
      supported by the wall; an open newel; also, the
      stringpiece or rail winding around the well of such a
      staircase.

   Hollow quoin (Engin.), a pier of stone or brick made behind
      the lock gates of a canal, and containing a hollow or
      recess to receive the ends of the gates.

   Hollow root. (Bot.) See Moschatel.

   Hollow square. See Square.

   Hollow ware, hollow vessels; -- a trade name for cast-iron
      kitchen utensils, earthenware, etc.

   Syn: Syn.- Concave; sunken; low; vacant; empty; void; false;
        faithless; deceitful; treacherous.
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The Collaborative International Dictionary of English v.0.48:

Moschatel \Mos"cha*tel`\, n. [Gr. ? musk: cf. F. moscatelline.
   See Muscadel, Musk.] (Bot.)
   A plant of the genus Adoxa (Adoxa moschatellina), the
   flowers of which are pale green, and have a faint musky
   smell. It is found in woods in all parts of Europe, and is
   called also hollow root and musk crowfoot. --Loudon.
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