bisymmetry
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bisymmetric — adjective Symmetric about both of its main diagonals. See Also: bisymmetrical, bisymmetry … Wiktionary
bisymmetrical — /ˌbaɪsəˈmɛtrɪkəl/ (say .buysuh metrikuhl) adjective Botany having two planes of symmetry at right angles to each other. Also, bisymmetric. –bisymmetrically, adverb –bisymmetry /baɪˈsɪmətri/ (say buy simuhtree), noun …
