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单词 merosymmetrical
释义

merosymmetricaladj.

Brit. /ˌmɛrə(ʊ)sᵻˈmɛtrᵻkl/, U.S. /ˈˌmɛrəsəˈmɛtrək(ə)l/
Origin: Formed within English, by compounding. Etymons: mero- comb. form1, symmetrical adj.
Etymology: < mero- comb. form1 + symmetrical adj. Compare merosymmetry n.Apparently coined by M. H. N. Story-Maskelyne in a lecture on the morphology of crystals given at the Chemical Society (see quot. 1875 and compare maskelynite n.).
Crystallography. Now rare.
= merohedral adj.
ΚΠ
1875 Chem. News 19 Mar. 121/1 Such partially developed forms Mr. Maskelyne designated as mero-symmetrical forms.
1878 H. P. Gurney Crystallogr. 39 Such forms are called merosystematic or merosymmetrical, or partially symmetrical forms.
1895 N. Story-Maskelyne Crystallogr. §137 Mero-symmetrical forms may be hemi-symmetrical.
1992 Academic Press Dict. Sci. & Technol. 1352/2 Merohedral.., a crystal with symmetrical suppression of half, three-quarters, or seven-eighths of the faces found on the holohedral form. Also, merosymmetrical.
This entry has been updated (OED Third Edition, September 2001; most recently modified version published online March 2022).
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adj.1875
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