Perpendicular is the relationship between two lines which meet at a right angle.
Perpendicular may also refer to:
Mathematics Perpendicular axis theorem
Medical Perpendicular plate of ethmoid bone Perpendicular plate of palatine bone
Places Perpendicular Gothic architecture style of mediaeval Gothic architecture in the Kingdom of England Perpendicular Point, New Zealand
Other uses Perpendicular recording, disc drive technology
See also Point Perpendicular, New South Wales, Australia Purpendicular, music album by Deep Purple