perpendicular love

# perpendicular

## Definitions

### from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Mathematics Intersecting at or forming right angles.
• adjective Being at right angles to the horizontal; vertical. synonym: vertical.
• adjective Of or relating to a style of English Gothic architecture of the 1300s and 1400s, characterized by emphasis of the vertical element.
• adverb In a perpendicular position.
• noun Mathematics A line or plane perpendicular to a given line or plane.
• noun A perpendicular position.
• noun A device, such as a plumb line, that is used in marking the vertical from a given point.
• noun A vertical or nearly vertical line or plane.

### from The Century Dictionary.

• 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.
• noun 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.
• noun 2. In geometry, a line that meets another line or a place at right angles, or makes equal angles with it on every side.
• noun 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.
• noun 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 the GNU version of the Collaborative International Dictionary of English.

• adjective 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.
• adjective (Geom.) At right angles to a given line or surface.
• adjective (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.
• noun A line at right angles to the plane of the horizon; a vertical line or direction.
• noun (Geom.) A line or plane falling at right angles on another line or surface, or making equal angles with it on each side.

• adjective geometry At or forming a right angle (to).
• noun geometry A line or plane that is perpendicular to another.
• noun A device such as a plumb line that is used in making or marking a perpendicular line.

• noun a straight line at right angles to another line
• noun 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
• adjective at right angles to the plane of the horizon or a base line
• adjective intersecting at or forming right angles
• noun a Gothic style in 14th and 15th century England; characterized by vertical lines and a four-centered (Tudor) arch and fan vaulting
• noun an extremely steep face

## Etymologies

### from The American Heritage® Dictionary of the English Language, 4th Edition

[Middle English perpendiculer, from Old French, from Latin perpendiculāris, from perpendiculum, plumb line, from perpendere, to weigh carefully : per-, per- + pendere, to weigh; see (s)pen- in Indo-European roots.]

Latin perpendiculum ("plumb line").

## Examples

• 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!

Alps 2010

• Shouldn't she be resting instead of dashing to-and-fro, drying the raindrops that land in perpendicular plop-plop!

Cafés 2010

• 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.

Handwork in Wood William Noyes

• 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!"

The Pilot James Fenimore Cooper 1820