Irregular

• Accounting irregularity
• Anomaly (disambiguation)
• Baker Street Irregulars
• Canonical impediment
• Constipation
• Irregular bone
• Irregular chess opening
• Irregular galaxy
• Irregular heartbeat
• Irregular inflection
• Irregular military
• Irregular moon
• Irregular variable
• Irregular verb
• Irregularity index
• Irregularity of a surface
• Irregularity of distributions
• Menstrual cycle
• Regular (disambiguation)
• polygon
• polyhedron
• regulation