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Meanings of trigonal in English

Having threefold symmetry.

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        Examples for "rhombohedral"
        Examples for "rhombohedral"
        1
        Shapes rhomboidal, perchance rhombohedral-whoknows?
        Punch, or the London Charivari, Vol. 146, February 25, 1914
        2
        There are recent reports of weak ferromagnetism in graphite and synthetic carbon materials such as rhombohedral C(60) (ref.
        Pubmed
        3
        The inclusions in the igneous matrix are unusual in that all possible crystalline morphologies for corundum are present: bipyramidal, prismatic, tabular, and rhombohedral.
        The Fall of Reach
        4
        The crystals belonged to rhombohedral space group R3 with a = 291.4 A and alpha = 61.9 degrees.
        Pubmed
        5
        A remarkable case of enclosed impurities is presented by the so-called Fontainbleau limestone, which consists of crystals of calcite of an acute rhombohedral form (fig.
        Encyclopaedia Britannica, 11th Edition, "Bulgaria" to "Calgary" ...
        Usage of trigonal in English
        1
        Boron atoms are found in trigonal prisms formed by metal atoms.
        Pubmed
        2
        Lithium ions intercalate into a WO 3 crystal framework and occupy trigonal cavity sites during the electrochemical polarization.
        Pubmed
        3
        The trigonal crystal forms contain one virion per unit cell and the orthorhombic form contains two particles per cell.
        Pubmed
        4
        The difference between the two trigonal crystal forms is 1.1 degrees in the orientation of the virus particle as determined from the rotation function.
        Pubmed
        Trigonal through the time