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Triangle   /trˈaɪˌæŋgəl/   Listen
noun
Triangle  n.  
1.
(Geom.) A figure bounded by three lines, and containing three angles. Note: A triangle is either plane, spherical, or curvilinear, according as its sides are straight lines, or arcs of great circles of a sphere, or any curved lines whatever. A plane triangle is designated as scalene, isosceles, or equilateral, according as it has no two sides equal, two sides equal, or all sides equal; and also as right-angled, or oblique-angled, according as it has one right angle, or none; and oblique-angled triangle is either acute-angled, or obtuse-angled, according as all the angles are acute, or one of them obtuse. The terms scalene, isosceles, equilateral, right-angled, acute-angled, and obtuse-angled, are applied to spherical triangles in the same sense as to plane triangles.
2.
(Mus.) An instrument of percussion, usually made of a rod of steel, bent into the form of a triangle, open at one angle, and sounded by being struck with a small metallic rod.
3.
A draughtsman's square in the form of a right-angled triangle.
4.
(Mus.) A kind of frame formed of three poles stuck in the ground and united at the top, to which soldiers were bound when undergoing corporal punishment, now disused.
5.
(Astron.)
(a)
A small constellation situated between Aries and Andromeda.
(b)
A small constellation near the South Pole, containing three bright stars.
Triangle spider (Zool.), a small American spider (Hyptiotes Americanus) of the family Ciniflonidae, living among the dead branches of evergreen trees. It constructs a triangular web, or net, usually composed of four radii crossed by a double elastic fiber. The spider holds the thread at the apex of the web and stretches it tight, but lets go and springs the net when an insect comes in contact with it.





Collaborative International Dictionary of English 0.48


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"Triangle" Quotes from Famous Books



... equal to the whole. By exactness is meant that but a single principle has been used, and so no object denoted by the term explained will be included in more than one of the divisions made. There are no triangles which are neither right nor oblique, so the division is complete; and no triangle can be both right and oblique, so the division is exact. Such a complete and exact division ...
— Composition-Rhetoric • Stratton D. Brooks
... unconscious of the picture they were forming. The tall ranchman, clad in full cowboy paraphernalia, his extended legs encased in leathern "shaps" decorated with long fringes, his belt of rattlesnake-skin, his loose shirt showing a triangle of bronzed throat, in his hand the broad sombrero clasped about with a ...
— Peak and Prairie - From a Colorado Sketch-book • Anna Fuller
... castle was built upon the plan of a triangle, with a tower at each angle, the one at the apex being the donjon. The form of this lofty keep is rectangular, and the machicolations and embattlements which were added in the fifteenth century are in a perfect state of preservation. Upon the platform, which I was able ...
— Wanderings by southern waters, eastern Aquitaine • Edward Harrison Barker
... compassionate an understanding of human nature, and of so honest an attack on the eternal problem of love and living, that it can well afford to take its chances on its own merits. But Lawrence Gordon, the blind hero of the triangle tragedy, which runs its inevitable course in the mountain cabin of Philip Ortez, takes on a new interest, when we learn that his creator is himself a ...
— Claire - The Blind Love of a Blind Hero, By a Blind Author • Leslie Burton Blades
... worn. They consist of bands of beads, arranged symmetrically according to color in geometrical figures—a triangle of yellow beads, a rectangle of black ones, or other patterns. This necklet is usually about 2 centimeters broad and long enough to fit the neck tightly. It is fastened at the back by a button and usually has a single string of beads depending from it and lying ...
— The Manbos of Mindano - Memoirs of the National Academy of Sciences, Volume XXIII, First Memoir • John M. Garvan


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