1. relating to or having a crystal system characterized by three unequal axes at right angles to each other
Usage: crystallography

Examples

• The mineral sulfur crystallizes in an orthorhombic system.
• Orthorhombic crystals have three perpendicular axes of different lengths.
• The geologist identified the specimen as having an orthorhombic structure.
• Many common minerals exhibit orthorhombic symmetry.
• The crystal’s orthorhombic form was clearly visible under the microscope.