1. Of a crystal or crystal form: having the maximum number of faces required by the symmetry of its crystal system.
Usage: technical; crystallography

Examples

• The holohedral form of a cubic crystal displays all 48 faces.
• In crystallography, a holohedral crystal exhibits the full symmetry of its crystal class.
• The mineral displayed holohedral characteristics with complete facial development.
• Holohedral crystals are contrasted with hemihedral forms that show reduced symmetry.