The Collaborative International Dictionary of English v.0.48:

Crystallize \Crys"tal*lize\ (kr[i^]s"tal*l[imac]z), v. t. [imp.
   & p. p. Crystallized (-l[imac]zd); p. pr. & vb. n.
   Crystallizing.] [Cf. F. cristalliser. See Crystal.]
   To cause to form crystals, or to assume the crystalline form.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

crystallized \crystallized\ adj.
   1. smoothly coated with crystals of sugar; -- used especially
      of fruits.

   Syn: candied, glac['e], glac['e]ed.
        [WordNet 1.5]

   2. caused to form into crystals; hence, in a crystalline
      form.
      [PJC] Crystallogenic

WordNet (r) 3.0 (2006):

crystallized
    adj 1: having become fixed and definite in form; "distinguish
           between crystallized and uncrystallized opinion"-
           Psychological Abstracts [syn: crystallized,
           crystallised] [ant: uncrystallised, uncrystallized]
    2: having both internal structure and external form of a
       crystal; "quartz crystal is perfectly crystallized" [syn:
       crystallized, crystalised]

Moby Thesaurus II by Grady Ward, 1.0:

27 Moby Thesaurus words for "crystallized":
   backed, calcified, callous, calloused, case-hardened, crusted,
   crusty, fossilized, granulated, hardened, hornified, incrusted,
   indurate, indurated, lapidified, ossified, petrified, reinforced,
   rigidified, sclerotic, set, solidified, steeled, stiffened,
   strengthened, toughened, vitrified