The Collaborative International Dictionary of English v.0.48:

morel \mor"el\ (m[o^]r"[e^]l), n. [See moril.] (Bot.)
   An edible fungus (Morchella esculenta), the upper part of
   which is covered with a reticulated and pitted hymenium. It
   is used as food, and for flavoring sauces. [Written also
   moril.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

morel \mor"el\, n. [See morelle.] (Bot.)
   1. Nightshade; -- so called from its blackish purple berries.
      [Written also morelle.]
      [1913 Webster]

   2. A kind of cherry. See Morello.
      [1913 Webster]

   Great morel, the deadly nightshade.

   Petty morel, the black nightshade. See Nightshade.
      [1913 Webster]

WordNet (r) 3.0 (2006):

morel
    n 1: any of various edible mushrooms of the genus Morchella
         having a brownish spongelike cap