Perpendicular is the relationship between two lines which meet at a right angle.

Look up perpendicular in Wiktionary, the free dictionary.

Perpendicular may also refer to:

• Perpendicular axis theorem
• Perpendicular Gothic architecture style of mediaeval Gothic architecture in the Kingdom of England
• Perpendicular plate of ethmoid bone
• Perpendicular plate of palatine bone
• Perpendicular Point, New Zealand
• Perpendicular recording, disc drive technology

• Point Perpendicular, New South Wales, Australia
• Purpendicular, music album by Deep Purple

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