perpendicular
Concise Oxford English Dictionary © 2008 Oxford University Press:
perpendicular /ˌpəːp(ə)nˈdɪkjʊlə/
▶adjective
- 1 at an angle of 90° to a given line, plane, or surface.
- 2 at an angle of 90° to the ground; vertical.
- 3 (Perpendicular) denoting the latest stage of English Gothic church architecture, prevalent from the late 14th to mid 16th centuries, characterized by broad arches and elaborate fan vaulting.
– derivatives
perpendicularity noun,
perpendicularly adverb.
perpendicularity noun,
perpendicularly adverb.
– origin ME: via OFr. from L. perpendicularis, from perpendiculum ‘plumb line’.
'perpendicular' also found in these Oxford entries:
altitude
- angle of incidence
- angle of reflection
- angle of refraction
- batter
- beam
- Cartesian coordinates
- cathetometer
- circular polarization
- Coriolis effect
- couple
- direct
- ellipsoid
- focal plane
- frame tent
- geographical latitude
- lean
- let
- light
- maxwell
- minor axis
- oblique
- pitch
- rake
- sag
- sheer
- steep
