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Tetragonal   Listen
adjective
Tetragonal  adj.  
1.
(Geom.) Of or pertaining to a tetragon; having four angles or sides; thus, the square, the parallelogram, the rhombus, and the trapezium are tetragonal fingers.
2.
(Bot.) Having four prominent longitudinal angles.
3.
(Crystallog.) Designating, or belonging to, a certain system of crystallization; dimetric. See Tetragonal system, under Crystallization.





Collaborative International Dictionary of English 0.48


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"Tetragonal" Quotes from Famous Books



... silent; watched it furtively, fearfully. I knew it for the ruins that are called Nan-Tauach, the 'place of frowning walls.' And at the silence of my men I recalled what Christian had written of this place; of how he had come upon its 'ancient platforms and tetragonal enclosures of stonework; its wonder of tortuous alleyways and labyrinth of shallow canals; grim masses of stonework peering out from behind verdant screens; cyclopean barricades,' and of how, when he had ...
— The Moon Pool • A. Merritt
... exhibits dimorphism. When precipitated from solutions it forms red tetragonal crystals, which, on careful heating, give a yellow rhombic form, also obtained by crystallization from the fused substance, or by sublimation. The transition point is 126.3 deg. (W. Schwarz, Zeit. f. Kryst. 25, p. 613), but both modifications may exist in metastable ...
— Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 - "Chtelet" to "Chicago" • Various


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