a. [f. TRI- 1 a + DIMENSIONAL.] Having or exhibiting three dimensions, as a solid body. Hence Tridimensionality, the condition or quality of being of three dimensions (in quot. 1894 loosely used).

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1875.  Cayley, in Phil. Trans., CLXV. 678. Theorem C, in the particular case of *tridimensional space.

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1894.  Nation (N. Y.), 23 Aug., 145/1. The tridimensional graphs of Wislicenus.

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1906.  Athenæum, 19 May, 612/3. An ingenious series of star charts … which when looked at through red and green spectacles exhibit the stars as appearing in tri-dimensional space.

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1894.  Nation (N. Y.), 13 Sept., 192/2. There are three fundamental color-sensations…; but there is nothing corresponding to this *tri-dimensionality in the vibrations themselves.

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1901.  Titchener, Exper. Psychol., I. ix. 138. The two figures will approach each other, and at last will overlap…. At the moment of complete overlapping, the cone stands out with an almost startling tridimensionality.

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