A dye, derived from gentian violet, that is used as an acid-base indicator and as a biological stain.

(chemistry) The water present in the crystals of the salts of certain metals; it is weakly bound by electrostatic forces and may normally be removed by heating.

Synonym of crystal set

(colloquial) The drug methamphetamine hydrochloride.

(chemistry, physics) A phase of matter similar to a liquid, in which the molecules are arranged regularly in one or two dimensions. / Material in that phase.

(physics, chemistry) the separation of two solutes from the same solution by using either a solvent or a crystallization temperature such that only one solute is supersaturated and crystallizes out

A material formed from by the growth of a crystal nucleus without secondary nucleation or impingement on other crystals; a regular three-dimensional structure extends throughout the material

(crystallography) A regular three-dimensional geometric arrangement of atoms, molecules or ions in a crystal

Alternative form of crystal meth

plural of negative crystal