Look up perpendicular in Wiktionary, the free dictionary.
Perpendicular is the relationship between two lines which meet at a right angle.
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