from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Mathematics Intersecting at or forming right angles.
- adj. Being at right angles to the horizontal; vertical. See Synonyms at vertical.
- adj. Of or relating to a style of English Gothic architecture of the 14th and 15th centuries, characterized by emphasis of the vertical element.
- adv. In a perpendicular position.
- n. Mathematics A line or plane perpendicular to a given line or plane.
- n. A perpendicular position.
- n. A device, such as a plumb line, used in marking the vertical from a given point.
- n. A vertical or nearly vertical line or plane.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. At or forming a right angle (to).
- n. A line or plane that is perpendicular to another.
- n. A device such as a plumb line that is used in making or marking a perpendicular line.
from the GNU version of the Collaborative International Dictionary of English
- adj. 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.
- adj. At right angles to a given line or surface.
- n. A line at right angles to the plane of the horizon; a vertical line or direction.
- n. A line or plane falling at right angles on another line or surface, or making equal angles with it on each side.
from The Century Dictionary and Cyclopedia
- Perfectly vertical; at right angles with the plane of the horizon; passing (if extended through the center of the earth; coinciding with the direction of gravity.
- In geometry, meeting a given line or surface (to which it is said to be perpendicular) at right angles.
- In zoology, forming a right angle with the longitudinal or latitudinal axis of the body: as, a perpendicular head; epimeron perpendicular, etc.
- n. A line at right angles to the plane of the horizon; a line that coincides in direction with a radius of the earth or with the direction of gravity.
- n. 2. In geometry, a line that meets another line or a place at right angles, or makes equal angles with it on every side.
- n. In gunnery, a small instrument for finding the center-line of a piece of ordnance, in the operation of pointing it at an object; a gunner's level.
- n. In ship-building, one of the three conventional lines perpendicular to the line of the keel, used as reference lines from which measurements in the fore-and-aft direction are taken.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a straight line at right angles to another line
- n. 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
- adj. at right angles to the plane of the horizon or a base line
- adj. intersecting at or forming right angles
- n. a Gothic style in 14th and 15th century England; characterized by vertical lines and a four-centered (Tudor) arch and fan vaulting
- n. an extremely steep face
- adj. extremely steep
In fixing a barometer for observation, it is indispensable that it be hung in a perpendicular position, seeing that it is the _perpendicular distance_ between the surface of the mercury in the cistern and the top of the column which is the true height of the barometer.
Shouldn't she be resting instead of dashing to-and-fro, drying the raindrops that land in perpendicular plop-plop!
The only corkscrew she had was a solid wooden-handled one with the screw sticking out perpendicular from the center (like a letter “T”).
Napping on the couch is not a long-term solution, but the couch does come with a built-in perpendicular, which the bed does not, so that's good.
Work done in this way is often called perpendicular chiseling, Fig. 72.
The Federal gun-boats have iron-plated sides placed in perpendicular bars on the timbers, and when in action no one appears on deck bu the signalmen, the vessels being steered from a shotproof pilot-house forwards.
By holding these rules in different positions, the children readily became familiar with the meaning and practical application of the terms perpendicular, horizontal, and oblique.
White river; which rose, perhaps, from one to two hundred feet in perpendicular height, and sixty or eighty yards asunder.
"Beach!" retorted Barnstable; "do you call a perpendicular rock of a hundred feet in height a beach!"
In the second case, again, the positions of two intersecting or meeting lines are of such a nature that there can likewise be only one line called the perpendicular, which is not more inclined to the one side than the other, and it divides space on either side into two equal parts.