| a. | 1. | Crystal-like; transparent like crystal. |
| n. | 1. | (Chem.) A body which, in solution, diffuses readily through animal membranes, and generally is capable of being crystallized; - opposed to colloid. |
| 2. | (Bot.) One of the microscopic particles resembling crystals, consisting of protein matter, which occur in certain plant cells; - called also protein crystal. |