The Collaborative International Dictionary of English v.0.48:

Hyaline \Hy"a*line\, a. [L. hyalinus, Gr. ?, fr. "y`alos glass:
   cf. F. hyalin.]
   Glassy; resembling glass; consisting of glass; transparent,
   like crystal. "Hyaline spaces." --Carpenter.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Hyaline \Hy"a*line\, n.
   1. A poetic term for the sea or the atmosphere. "The clear
      hyaline, the glassy sea." --Milton.
      [1913 Webster]

            Our blood runs amazed 'neath the calm hyaline.
                                                  --Mrs.
                                                  Browning.
      [1913 Webster]

   2. (Biol.) The pellucid substance, present in cells in
      process of development, from which, according to some
      embryologists, the cell nucleus originates.
      [1913 Webster]

   3. (Physiol. Chem.) The main constituent of the walls of
      hydatid cysts; a nitrogenous body, which, by
      decomposition, yields a dextrogyrate sugar, susceptible of
      alcoholic fermentation. --Gamgee.
      [1913 Webster]

WordNet (r) 3.0 (2006):

hyaline
    adj 1: resembling glass in transparency or translucency; "the
           morning is as clear as diamond or as hyaline"-Sacheverell
           Sitwell [syn: hyaline, hyaloid]
    n 1: a glassy translucent substance that occurs in hyaline
         cartilage or in certain skin conditions [syn: hyaline,
         hyalin]

Moby Thesaurus II by Grady Ward, 1.0:

30 Moby Thesaurus words for "hyaline":
   Caelus, air, azure, blue sky, caelum, canopy, canopy of heaven,
   cerulean, clear as glass, cope, empyrean, ether, firmament, glass,
   glasslike, glassy, heaven, heavens, hyalescent, lift, lifts, sky,
   starry heaven, the blue, the blue serene, vault, vault of heaven,
   vitreous, vitriform, welkin