noun a crystalline substance.
2. crystalline ·adj consisting, or made, of crystal.
3. crystalline ·noun ·see aniline.
4. crystalline ·adj formed by crystallization; like crystal in texture.
5. crystalline ·adj fig.: resembling crystal; pure; transparent; pellucid.
6. crystalline ·adj imperfectly crystallized; as, granite is only crystalline, while quartz crystal is perfectly crystallized.