Source : Webster's Revised Unabridged Dictionary (1913)

Morus \Mo"rus\, n. [L., mulberry tree. See {Mulberry}.] (Bot.)
   A genus of trees, some species of which produce edible fruit;
   the mulberry. See {Mulberry}.

   Note:

   {Morus alba} is the white mulberry, a native of India or
      China, the leaves of which are extensively used for
      feeding silkworms, for which it furnishes the chief food.
      

   {Morus multicaulis}, the many-stemmed or Chinese mulberry, is
      only a form of white mulberry, preferred on account of its
      more abundant leaves.

   {Morus nigra}, the black mulberry, produces a dark-colored
      fruit, of an agreeable flavor.

Source : WordNet®

Morus nigra
     n : European mulberry having dark foliage and fruit [syn: {black
         mulberry}]