The Collaborative International Dictionary of English v.0.48:

Sclerenchyma \Scle*ren"chy*ma\, n. [NL., from Gr. sklhro`s hard
   + -enchyma as in parenchyma.]
   1. (Bot.) Vegetable tissue composed of short cells with
      thickened or hardened walls, as in nutshells and the
      gritty parts of a pear. See Sclerotic.
      [1913 Webster]

   Note: By recent German writers and their English translators,
         this term is used for liber cells. --Goodale.
         [1913 Webster]

   2. (Zool.) The hard calcareous deposit in the tissues of
      Anthozoa, constituting the stony corals.
      [1913 Webster]