The Collaborative International Dictionary of English v.0.48:

Crystalloid \Crys"tal*loid\ (kr[i^]s"tal*loid), a. [Gr.
   kry`stallos crystal + -oid.]
   Crystal-like; transparent like crystal.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Crystalloid \Crys"tal*loid\, n.
   1. (Chem.) A body which, in solution, diffuses readily
      through animal membranes, and generally is capable of
      being crystallized; -- opposed to colloid.
      [1913 Webster]

   2. (Bot.) One of the microscopic particles resembling
      crystals, consisting of protein matter, which occur in
      certain plant cells; -- called also protein crystal.
      [1913 Webster]