quartzoidn.

Brit.

/ˈkwɔːtsɔɪd/, U.S.

/ˈkwɔrtsɔɪd/

Origin: Formed within English, by derivation; modelled on a German lexical item. Etymons: quartz n., -oid suffix.

Etymology: < quartz n. + -oid suffix , after German Quartzoid ( W. Haidinger Handb. der Mineral. (1845) 116).

Mineralogy.

A crystal having the form of two six-sided pyramids united by their bases.

ΚΠ

1850 J. D. Dana Syst. Mineral. (ed. 3) 39 An isosceles dodecahedron... Such is the origin of the pyramidal termination of crystals of quartz, and the form is called by Haidinger the quartzoid.

1868 J. D. Dana Syst. Mineral. (ed. 5) ii. 59 Wurtzite... Occurring form a quartzoid, with occasionally planes of the corresponding hexagonal prism.

1909 M. E. Wadsworth Crystallography xii. 197 Secondary Hexagonal Pyramid, alias Hexagonal Pyramid of the Second Order,..Quartzoid of the Second Order, etc. Nickname, Quartzoid.

1937 Rocks & Minerals 12 59/2 Quartzoid, quartz crystal having the form of two six-sided pyramids base to base; thus having no prism.

2006 M. O'Donoghue Gems (ed. 6) xvi. 296 The name quartzoid has been used for this type of crystal which resembles a hexagonal pyramid.

This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022).

单词	quartzoid
释义	quartzoidn. Brit. /ˈkwɔːtsɔɪd/, U.S. /ˈkwɔrtsɔɪd/ Origin: Formed within English, by derivation; modelled on a German lexical item. Etymons: quartz n., -oid suffix. Etymology: < quartz n. + -oid suffix , after German Quartzoid ( W. Haidinger Handb. der Mineral. (1845) 116). Mineralogy. A crystal having the form of two six-sided pyramids united by their bases. ΚΠ 1850 J. D. Dana Syst. Mineral. (ed. 3) 39 An isosceles dodecahedron... Such is the origin of the pyramidal termination of crystals of quartz, and the form is called by Haidinger the quartzoid. 1868 J. D. Dana Syst. Mineral. (ed. 5) ii. 59 Wurtzite... Occurring form a quartzoid, with occasionally planes of the corresponding hexagonal prism. 1909 M. E. Wadsworth Crystallography xii. 197 Secondary Hexagonal Pyramid, alias Hexagonal Pyramid of the Second Order,..Quartzoid of the Second Order, etc. Nickname, Quartzoid. 1937 Rocks & Minerals 12 59/2 Quartzoid, quartz crystal having the form of two six-sided pyramids base to base; thus having no prism. 2006 M. O'Donoghue Gems (ed. 6) xvi. 296 The name quartzoid has been used for this type of crystal which resembles a hexagonal pyramid. This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022). < n.1850
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