pyritoidn.adj.

Brit.

/ˈpʌɪrᵻtɔɪd/,

/pʌɪˈrʌɪtɔɪd/, U.S.

/pəˈraɪˌtɔɪd/,

/paɪˈraɪˌtɔɪd/

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

Etymology: < pyrite n. + -oid suffix, after German Pyritoid ( W. Haidinger Handb. der bestimmenden Mineral. (1845) 102). Compare earlier pyritohedron n. N.E.D. (1909) gives the pronunciation as (pirəi·toid) /pɪˈraɪtɔɪd/.

A. n.

Crystallography. = pyritohedron n. Now rare.

ΘΚΠ

the world > matter > chemistry > crystallography (general) > crystal (general) > specific crystal forms > [noun] > miscellaneous others

pyramid1748

hemihedron1837

pyritohedron1841

adamantoid1850

pyritoid1850

orthoprism1872

orthopyramid1872

polyprism1873

macropyramid1883

shish kebab1966

1850 J. D. Dana Syst. Mineral. (ed. 3) 36 Pyritoid of Haidinger.

1875 F. A. Genth Preliminary Rep. Mineral. Pennsylvania 22 The only specimen which is known consists of an incrustation of minute crystals, which are combinations of cubes, octahedra and rarely the pyritoid.

1892 Amer. Naturalist 26 614 Ullmanite crystals..are described as consisting of cubes with striations parallel to the pyritoid edge.

1910 W. S. Bayley Elem. Crystallogr. xii. 137 When in combination with distinctive hemihedrons, these are always either the diploid or the pyritoid, the characteristic hemihedrons of parallel hemihedrism.

2000 M. Manutchehr-Danai Dict. Gems & Gemology 361/2 Pentahedral dodecahedron, a crystal of isometric system comprised of 12 identical five-sided faces... Also called regular dodecahedron, pyritoid or pyritohedron.

†B. adj.

Mineralogy. Resembling pyrite in crystal structure. Obsolete. rare.

ΚΠ

1895 N. Story-Maskelyne Crystallogr. vii. §190 Of the different pentagonohedra known on the pyritoid minerals the only one that is self-existent is the ‘pyritohedron’.

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

单词	pyritoid
释义	pyritoidn.adj. Brit. /ˈpʌɪrᵻtɔɪd/, /pʌɪˈrʌɪtɔɪd/, U.S. /pəˈraɪˌtɔɪd/, /paɪˈraɪˌtɔɪd/ Origin: Formed within English, by derivation; modelled on a German lexical item. Etymons: pyrite n., -oid suffix. Etymology: < pyrite n. + -oid suffix, after German Pyritoid ( W. Haidinger Handb. der bestimmenden Mineral. (1845) 102). Compare earlier pyritohedron n. N.E.D. (1909) gives the pronunciation as (pirəi·toid) /pɪˈraɪtɔɪd/. A. n. Crystallography. = pyritohedron n. Now rare. ΘΚΠ the world > matter > chemistry > crystallography (general) > crystal (general) > specific crystal forms > [noun] > miscellaneous others pyramid1748 hemihedron1837 pyritohedron1841 adamantoid1850 pyritoid1850 orthoprism1872 orthopyramid1872 polyprism1873 macropyramid1883 shish kebab1966 1850 J. D. Dana Syst. Mineral. (ed. 3) 36 Pyritoid of Haidinger. 1875 F. A. Genth Preliminary Rep. Mineral. Pennsylvania 22 The only specimen which is known consists of an incrustation of minute crystals, which are combinations of cubes, octahedra and rarely the pyritoid. 1892 Amer. Naturalist 26 614 Ullmanite crystals..are described as consisting of cubes with striations parallel to the pyritoid edge. 1910 W. S. Bayley Elem. Crystallogr. xii. 137 When in combination with distinctive hemihedrons, these are always either the diploid or the pyritoid, the characteristic hemihedrons of parallel hemihedrism. 2000 M. Manutchehr-Danai Dict. Gems & Gemology 361/2 Pentahedral dodecahedron, a crystal of isometric system comprised of 12 identical five-sided faces... Also called regular dodecahedron, pyritoid or pyritohedron. †B. adj. Mineralogy. Resembling pyrite in crystal structure. Obsolete. rare. ΚΠ 1895 N. Story-Maskelyne Crystallogr. vii. §190 Of the different pentagonohedra known on the pyritoid minerals the only one that is self-existent is the ‘pyritohedron’. This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022). < n.adj.1850
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