PYRAMIDAL • DICTIONARY ONE.COM • Definition of Pyramidal

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/pərˈæmədəl/ Listen

adjective

Pyramidal adj.

Of or pertaining to a pyramid; in the form of a a pyramid; pyramidical; as, pyramidal cleavage. "The mystic obelisks stand up Triangular, pyramidal."

(Crystallog.) Same as Tetragonal.

Pyramidal numbers (Math.), certain series of figurate numbers expressing the number of balls or points that may be arranged in the form of pyramids. Thus 1, 4, 10, 20, 35, etc., are triangular pyramidal numbers; and 1, 5, 14, 30, 55, etc., are square pyramidal numbers.

noun

Pyramidal n. (Anat.) One of the carpal bones. See Cuneiform, n., 2 (b).

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Etymology of 'Pyramidal'

Collaborative International Dictionary of English 0.48

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"Pyramidal" Quotes from Famous Books

... is justly a general favourite: not but that you may have coffee, chocolate, punch, peach, almond, and in short every species of gratification of this kind; while the glasses are filled to a great height, in a pyramidal shape, and some of them with layers of strawberry, gooseberry, and other coloured ice—looking like pieces of a Harlequin's jacket—are seen moving to and fro, to be silently and certainly devoured by those who bespeak them. Add to this, every one has his tumbler and small water-bottle by ...

— A Bibliographical, Antiquarian and Picturesque Tour in France and Germany, Volume Two • Thomas Frognall Dibdin

... engraaaaver. Lloyd then prints 'em: are they not fun? I doat on them; in my next venture, I am going to have colour printing; it will be very laborious, six blocks to cut for each picter, but the result would be pyramidal. ...

— The Works of Robert Louis Stevenson - Swanston Edition Vol. 23 (of 25) • Robert Louis Stevenson

... liqueurs—all created a picture of colorful luxury, which, we are assured, struck those that looked upon it as "most agreeable." Threading their musical murmurings through all the laughter and badinage, the tossing jets of the pyramidal fountains fell away to pools ...

— The Story of Versailles • Francis Loring Payne

... similar to those on the coast line of our own country. Over these we gently ran day after day until we could see vast fields of sand and scrub that it must have taken thousands of years of gale and hurricane to deposit in the quaint pyramidal fashion in which they stand to-day. Even yet they are not fixed; occasionally a tree falls exposing the naked sand to the action of the wind, which swirls around the hole and moves the sand into a spiral ...

— With the "Die-Hards" in Siberia • John Ward

... happen to figures in the best ages of art, as if it had been boned for a pie, was called a fantoccio da cero, a tower-puppet; consequently improved taste, with Cecca to help it, had devised for the magnificent Zecca a triumphal car like a pyramidal catafalque, with ingenious wheels warranted to turn all corners easily. Round the base were living figures of saints and angels arrayed in sculpturesque fashion; and on the summit, at the height of ...

— Romola • George Eliot

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