The Collaborative International Dictionary of English v.0.48:

Sclerotic \Scle*rot"ic\, n. [Cf. F. scl['e]rotique.] (Anat.)
   The sclerotic coat of the eye. See Illust. of Eye
   (d) .
       [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sclerotic \Scle*rot"ic\, a. (Chem.)
   Pertaining to, or designating, an acid obtained from ergot or
   the sclerotium of a fungus growing on rye.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sclerotic \Scle*rot"ic\, a. [Gr. sklhro`s hard: cf. F.
   scl['e]rotique.]
   1. Hard; firm; indurated; -- applied especially in anatomy to
      the firm outer coat of the eyeball, which is often
      cartilaginous and sometimes bony.
      [1913 Webster]

   2. (Anat.) Of or pertaining to the sclerotic coat of the eye;
      sclerotical.
      [1913 Webster]

   3. (Med.) Affected with sclerosis; sclerosed.
      [1913 Webster]

   Sclerotic parenchyma (Bot.), sclerenchyma. By some writers
      a distinction is made, sclerotic parenchyma being applied
      to tissue composed of cells with the walls hardened but
      not thickened, and sclerenchyma to tissue composed of
      cells with the walls both hardened and thickened.
      [1913 Webster]

WordNet (r) 3.0 (2006):

sclerotic
    adj 1: relating to or having sclerosis; hardened; "a sclerotic
           patient" [syn: sclerotic, sclerosed]
    2: of or relating to the sclera of the eyeball; "sclerotic
       tissue"