liber cells

from 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]

from The Collaborative International Dictionary of English v.0.48

Liber \Li"ber\ (l[imac]"b[~e]r), n. [L. See {Libel}.] (Bot.)
   The inner bark of plants, lying next to the wood. It usually
   contains a large proportion of woody, fibrous cells, and is,
   therefore, the part from which the fiber of the plant is
   obtained, as that of hemp, etc.
   [1913 Webster]

   {Liber cells}, elongated woody cells found in the liber.
      [1913 Webster]