Definition of perpendicular

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Perpendicular (n.) A line at right angles to the plane of the horizon; a vertical line or direction.

Lern More About Perpendicular

Cathetus :: Cathetus (n.) One line or radius falling perpendicularly on another; as, the catheti of a right-angled triangle, that is, the two sides that include the right angle..
Perpendicular :: Perpendicular (a.) At right angles to a given line or surface; as, the line ad is perpendicular to the line bc..
Bitts :: Bitts (n. pl.) A frame of two strong timbers fixed perpendicularly in the fore part of a ship, on which to fasten the cables as the ship rides at anchor, or in warping. Other bitts are used for belaying (belaying bitts), for sustaining the windlass (carrick bitts, winch bitts, or windlass bitts), to hold the pawls of the windlass (pawl bitts) etc..
Curtate :: Curtate (a.) Shortened or reduced; -- said of the distance of a planet from the sun or earth, as measured in the plane of the ecliptic, or the distance from the sun or earth to that point where a perpendicular, let fall from the planet upon the plane of the ecliptic, meets the ecliptic..
Wall-sided :: Wall-sided (a.) Having sides nearly perpendicular; -- said of certain vessels to distinguish them from those having flaring sides, or sides tumbling home (see under Tumble, v. i.)..
Slant :: Slant (v. i.) Inclined from a direct line, whether horizontal or perpendicular; sloping; oblique..
Sine :: Sine (n.) The length of a perpendicular drawn from one extremity of an arc of a circle to the diameter drawn through the other extremity.
Elevation :: Elevation (n.) A geometrical projection of a building, or other object, on a plane perpendicular to the horizon; orthographic projection on a vertical plane; -- called by the ancients the orthography..
Normal :: Normal (a.) A straight line or plane drawn from any point of a curve or surface so as to be perpendicular to the curve or surface at that point.
Level :: Level (n.) A line or surface to which, at every point, a vertical or plumb line is perpendicular; a line or surface which is everywhere parallel to the surface of still water; -- this is the true level, and is a curve or surface in which all points are equally distant from the center of the earth, or rather would be so if the earth were an exact sphere..
Pole :: Pole (n.) A point upon the surface of a sphere equally distant from every part of the circumference of a great circle; or the point in which a diameter of the sphere perpendicular to the plane of such circle meets the surface. Such a point is called the pole of that circle; as, the pole of the horizon; the pole of the ecliptic; the pole of a given meridian..
Chesstree :: Chesstree (n.) A piece of oak bolted perpendicularly on the side of a vessel, to aid in drawing down and securing the clew of the mainsail..
Subsulphate :: Substyle (n.) A right line on which the style, or gnomon, of a dial is erected; being the common section of the face of the dial and a plane perpendicular to it passing through the style..
Flare :: Flare (v. i.) To open or spread outwards; to project beyond the perpendicular; as, the sides of a bowl flare; the bows of a ship flare..
Table :: Table (n.) A plane surface, supposed to be transparent and perpendicular to the horizon; -- called also perspective plane..
Waterfall :: Waterfall (n.) A fall, or perpendicular descent, of the water of a river or stream, or a descent nearly perpendicular; a cascade; a cataract..
Inclined :: Inclined (p. p. & a.) Bent out of a perpendicular position, or into a curve with the convex side uppermost..
Trip :: Trip (v. t.) To pull (a yard) into a perpendicular position for lowering it.
Hoist :: Hoist (n.) The perpendicular height of a flag, as opposed to the fly, or horizontal length when flying from a staff..
Erect :: Erect (v. t.) To raise and place in an upright or perpendicular position; to set upright; to raise; as, to erect a pole, a flagstaff, a monument, etc..
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