monosymmetricadj.
/ˌmɒnə(ʊ)sᵻˈmɛtrɪk/, U.S. /ˈˌmɑnəsəˈmɛtrɪk/ 1. Crystallography. = monoclinic adj.
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the world > matter > chemistry > crystallography (general) > crystal (general) > crystal systems > [adjective] > monoclinic
monoclinohedral1832
oblique1835
monoclinate1847
monoclinohedric1854
monoclinic1856
monoclinometric1858
monosymmetric1880
monosymmetrical1888
1880 Webster's Amer. Dict. Eng. Lang. Suppl. Monosymmetric, the same as Monoclinic.
1887 Athenæum 10 Sept. 345/2 [Graphite occurs] in tabular crystals so indistinctly formed as to render it uncertain whether they belong to the hexagonal or monosymmetric system.
1922 T. M. Lowry Inorg. Chem. xxix. 509 Calcium metasilicate, CaSiO3..is found in monosymmetric crystals of wollastonite.
1945 W. O. Howarth & L. G. G. Warne Lowson's Textbk. Bot. (ed. 9) ii. 25 Calcium oxalate occurs in a crystalline form, and the crystals may be of various types, the commonest belonging to the monosymmetric (monoclinic) system.
2. Chiefly Botany. Divisible into exactly similar halves in one plane only; (of a flower) zygomorphic. Also (Engineering): having, or designating a cross-section with, a single plane of symmetry. N.E.D. (quot. 1908) cites Cent. Dict., which however has the word only in sense 1.
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1908 N.E.D. Monosymmetric, Bot. = next [sc. Monosymmetrical].
1950 H. L. Engel in L. S. Hu et al. Steel Beams, Connections, Columns & Frames (University of Michigan, Dept. of Engineering) (1952) iv. 14 (title) Lateral buckling of bars of monosymmetric open cross sections.
1975 Ann. Missouri Bot. Garden 62 695 Pollen which is boat-shaped, heteropolar, and monosulcate..has been incorrectly described..as bilateral. Bilaterally symmetrical objects are divisible by only a single plane (i.e., are monosymmetric), not two, as are boat-shaped, bisymmetric, monosulcate pollen grains.
1990 Earthquake Engin. & Struct. Dynamics 19 244 Such a single mass monosymmetric model has been used by Tso and Bozorgnia.
1999 Internat. Jrnl. Plant Sci. 160 Suppl. No. 6. 3 During floral development, symmetry may change: monosymmetric flowers may have a polysymmetric early phase.
This entry has been updated (OED Third Edition, December 2002; most recently modified version published online March 2022).
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adj.1880