perpendicular

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perpendicular

1. at right angles to a horizontal plane
2. denoting, relating to, or having the style of Gothic architecture used in England during the 14th and 15th centuries, characterized by tracery having vertical lines, a four-centred arch, and fan vaulting
3. Geometry a line or plane perpendicular to another
4. any instrument used for indicating the vertical line through a given point
5. Mountaineering a nearly vertical face
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Perpendicular

Line or plane that meets another at right angles.

perpendicular

[¦pər·pən¦dik·yə·lər]
(mathematics)
Geometric objects are perpendicular if they intersect in an angle of 90°.
References in classic literature ?
One immediately perceived three long parallel streets, unbroken, undisturbed, traversing, almost in a straight line, all three cities, from one end to the other; from North to South, perpendicularly, to the Seine, which bound them together, mingled them, infused them in each other, poured and transfused the people incessantly, from one to the other, and made one out of the three.
The ground of the University was hilly; Mount Sainte- Geneviève formed an enormous mound to the south; and it was a sight to see from the summit of Notre-Dame how that throng of narrow and tortuous streets (to-day the Latin Quarter), those bunches of houses which, spread out in every direction from the top of this eminence, precipitated themselves in disorder, and almost perpendicularly down its flanks, nearly to the water's edge, having the air, some of falling, others of clambering up again, and all of holding to one another.
Here, there shot up, almost perpendicularly, into the sky, a height so steep, as to be hardly accessible to any but the sheep and goats that fed upon its sides, and there, stood a mound of green, sloping and tapering off so delicately, and merging so gently into the level ground, that you could scarce define its limits.
Hence the importance of the advice to try the experiment upon some point of that part of the globe, in order that the projectile might be discharged perpendicularly, and so the soonest escape the action of gravitation.
Second, that the gun should be a Columbiad cast in iron, 900 feet long, and run perpendicularly into the earth.
Within, down it sunk perpendicularly into a caldron, about a Danish mile in depth; while below lay a town, whose appearance we can, in some measure, realize to ourselves by beating the white of an egg in a glass Of water.
There was no way of penetrating the island from our cove, for the walls rose perpendicularly from the beach, and, on either side of the cove, rose from the deep water.
New technologies include an available front and 180A wide rear-view camera with washers, parking assist system that can now park the Explorer perpendicularly, while parking sensors are now available for the front.
A new requirement this year calls for the eggs to be placed perpendicularly to each other, thus complicating how teams protect the eggs in flight.
elegans embryo is uniquely suited to the study of the contractile ring, as cells dividing perpendicularly to the imaging plane provide a full end-on view of the contractile ring throughout constriction.
First, determine which way the ray is headed, motor to where you are able to perpendicularly Intercept the ray, keeping 30 or so feet of distance to not spook the ray.
Ours has Ford's clever Active Park Assist which will automatically parallel park and perpendicularly park the car for you.