crystal system
noun
: any of the six or sometimes seven main groups into which crystals are commonly classified according to the relative lengths and inclinations of their axes or according to their respective symmetries see hexagonal system, isometric system, monoclinic system, orthorhombic system, rhombohedral system, tetragonal system, triclinic system, trigonal system
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“Crystal system.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/crystal%20system. Accessed 29 Nov. 2024.
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