Crossword clues for perpendicular
perpendicular
Longman Dictionary of Contemporary English
The Collaborative International Dictionary
Perpendicular \Per`pen*dic"u*lar\, a. [L. perpendicularis, perpendicularius: cf. F. perpendiculaire. See Perpendicle, Pension.]
Exactly upright or vertical; pointing to the zenith; at right angles to the plane of the horizon; extending in a right line from any point toward the center of the earth.
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(Geom.) At right angles to a given line or surface; as, the line ad is perpendicular to the line bc.
Perpendicular style (Arch.), a name given to the latest variety of English Gothic architecture, which prevailed from the close of the 14th century to the early part of the 16th; -- probably so called from the vertical style of its window mullions.
Perpendicular \Per`pen*dic"u*lar\, n.
A line at right angles to the plane of the horizon; a vertical line or direction.
(Geom.) A line or plane falling at right angles on another line or surface, or making equal angles with it on each side.
Douglas Harper's Etymology Dictionary
late 15c., from adverb (late 14c.), from Old French perpendiculer, from Latin perpendicularis "vertical, as a plumb line," from perpendiculum "plumb line," from perpendere "balance carefully," from per- "thoroughly" (see per) + pendere "to weigh, to hang" (see pendant). As a noun from 1570s. Related: Perpendicularly; perpendicularity.\n
Wiktionary
a. (context geometry English) At or forming a right angle (to). n. 1 (context geometry English) A line or plane that is perpendicular to another. 2 A device such as a plumb line that is used in making or marking a perpendicular line.
WordNet
adj. intersecting at or forming right angles; "the axes are perpendicular to each other" [ant: oblique, parallel]
at right angles to the plane of the horizon or a base line; "a vertical camera angle"; "the monument consists of two vertical pillars supporting a horizontal slab"; "measure the perpendicular height" [syn: vertical] [ant: inclined, horizontal]
extremely steep; "the great perpendicular face of the cliff"
n. a straight line at right angles to another line
a Gothic style in 14th and 15th century England; characterized by vertical lines and a four-centered (Tudor) arch and fan vaulting [syn: perpendicular style, English-Gothic, English-Gothic architecture]
a cord from which a metal weight is suspended pointing directly to the earth's center of gravity; used to determine the vertical from a given point [syn: plumb line]
an extremely steep face
Wikipedia
In elementary geometry, the property of being perpendicular (perpendicularity) is the relationship between two lines which meet at a right angle (90 degrees). The property extends to other related geometric objects.
A line is said to be perpendicular to another line if the two lines intersect at a right angle. Explicitly, a first line is perpendicular to a second line if (1) the two lines meet; and (2) at the point of intersection the straight angle on one side of the first line is cut by the second line into two congruent angles. Perpendicularity can be shown to be symmetric, meaning if a first line is perpendicular to a second line, then the second line is also perpendicular to the first. For this reason, we may speak of two lines as being perpendicular (to each other) without specifying an order.
Perpendicularity easily extends to segments and rays. For example, a line segment $\overline{AB}$ is perpendicular to a line segment $\overline{CD}$ if, when each is extended in both directions to form an infinite line, these two resulting lines are perpendicular in the sense above. In symbols, $\overline{AB} \perp \overline{CD}$ means line segment AB is perpendicular to line segment CD.
A line is said to be perpendicular to a plane if it is perpendicular to every line in the plane that it intersects. This definition depends on the definition of perpendicularity between lines.
Two planes in space are said to be perpendicular if the dihedral angle at which they meet is a right angle (90 degrees).
Perpendicularity is one particular instance of the more general mathematical concept of orthogonality; perpendicularity is the orthogonality of classical geometric objects. Thus, in advanced mathematics, the word "perpendicular" is sometimes used to describe much more complicated geometric orthogonality conditions, such as that between a surface and its normal.
Perpendicular may refer to:
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Perpendicular, in mathematics two lines at right angles
- Perpendicular axis theorem
- Perpendicular Period, style and period of mediaeval English Gothic architecture
- Perpendicular plate of ethmoid bone
- Perpendicular plate of palatine bone
- Perpendicular Point, New Zealand
- Perpendicular recording, disc drive technology
Usage examples of "perpendicular".
He let them sail through the gate with their bodies parallel to its surface so that they arrived in External Hall perpendicular to the floor, where he easily brought them to a standing stop.
This they did at great risk on the perpendicular wall of the wreck, sending the mizzentopmast overside along in the general crash.
Instead of picturing to ourselves, as is usually done, light-rays which are shifted away from or towards the perpendicular at the border-plane between two media of different optical properties, we shall rather build up the picture as light itself designs it into space.
At this point indicated on the planisphere one of these currents was rolling, the Kuro-Scivo of the Japanese, the Black River, which, leaving the Gulf of Bengal, where it is warmed by the perpendicular rays of a tropical sun, crosses the Straits of Malacca along the coast of Asia, turns into the North Pacific to the Aleutian Islands, carrying with it trunks of camphor-trees and other indigenous productions, and edging the waves of the ocean with the pure indigo of its warm water.
He jumped to his feet and strode to the closet door, drawing it open so that it stood perpendicular to the wall.
France have made it no secret that those of England, as a general thing, are to their perception an inexpressive and speechless race, perpendicular and unsociable, unaddicted to enriching any bareness of contact with verbal or other embroidery.
After 3 additional hours terminal portion deflected at right angles from the perpendicular.
They act to some extent as suckers, and enable the anolis to climb the perpendicular faces of rocks, or even to hang from the under side of a branch.
When Bodhi turned back to the gate, it was like looking at a rippling pool that was somehow standing perpendicular to the ground.
Brim immediately hauled the little starship around on a low-altitude trajectory perpendicular to the cableway, watching the lorry speed away in the distance.
She fumbled at the chairs control, eventually coming perpendicular to local conditions.
It was also like this chart and other charts of the period in being all marked with lines perpendicular and across.
The first trouble was a chockstone, which I managed to climb round, and then the confounded thing widened and became perpendicular.
Glaisher, and in a lesser degree upon Coxwell, when, in 1862, they ascended in a balloon to the height of thirty thousand feet, was due to the extreme speed with which a perpendicular ascent is made.
Glaisher, and in a lesser degree upon Coxwell, when, in 1862, they ascended in a balloon to a height of thirty thousand feet, was due to the extreme speed with which a perpendicular ascent is made.