fluoroidn.

Brit.

/ˈflʊərɔɪd/,

/ˈflɔːrɔɪd/, U.S.

/ˈflʊˌrɔɪd/,

/ˈflɔˌrɔɪd/

Origin: Formed within English, by derivation; modelled on a German lexical item. Etymons: fluor n.¹, -oid suffix.

Etymology: < fluor n.¹ + -oid suffix, after German Fluoroid ( W. Haidinger Handb. der bestimmenden Mineral. (1845) 37); so called because the form is commonly shown by crystals of fluorite.

Crystallography. Now rare.

= tetrakis-hexahedron n.

ΘΚΠ

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

tripyramid1828

trisoctahedron1837

fluoroid1850

sphenoid1855

discalenohedron1872

prism1878

tetrakis-hexahedron1878

galenoid1882

macroprism1883

semi-form1895

tetartohedron1895

tetrakisdodecahedron1895

trichite1900

1850 J. D. Dana Syst. Mineral. (ed. 3) 33 Tetrahexahedron. [Note] Called Fluoroid by Haidinger, from its being a common form of fluor spar.

1909 M. E. Wadsworth Crystallography xii. 200 Tetrakis Hexahedron, alias Tetra Hexahedron, Hexahedral Trigonal Icosi Tetrahedron, Pyramidal Cube, etc. Nickname, Fluoroid.

1929 H. L. Bowman Miers's Mineral. (ed. 2) ii. ii. 357 The low four-faced cube {310} occurs as a simple form; {hk0} is so rare in other minerals that it is sometimes known as the ‘fluoroid’.

This entry has been updated (OED Third Edition, March 2012; most recently modified version published online March 2022).

单词	fluoroid
释义	fluoroidn. Brit. /ˈflʊərɔɪd/, /ˈflɔːrɔɪd/, U.S. /ˈflʊˌrɔɪd/, /ˈflɔˌrɔɪd/ Origin: Formed within English, by derivation; modelled on a German lexical item. Etymons: fluor n.¹, -oid suffix. Etymology: < fluor n.¹ + -oid suffix, after German Fluoroid ( W. Haidinger Handb. der bestimmenden Mineral. (1845) 37); so called because the form is commonly shown by crystals of fluorite. Crystallography. Now rare. = tetrakis-hexahedron n. ΘΚΠ the world > matter > chemistry > crystallography (general) > crystal (general) > specific crystal forms > [noun] tripyramid1828 trisoctahedron1837 fluoroid1850 sphenoid1855 discalenohedron1872 prism1878 tetrakis-hexahedron1878 galenoid1882 macroprism1883 semi-form1895 tetartohedron1895 tetrakisdodecahedron1895 trichite1900 1850 J. D. Dana Syst. Mineral. (ed. 3) 33 Tetrahexahedron. [Note] Called Fluoroid by Haidinger, from its being a common form of fluor spar. 1909 M. E. Wadsworth Crystallography xii. 200 Tetrakis Hexahedron, alias Tetra Hexahedron, Hexahedral Trigonal Icosi Tetrahedron, Pyramidal Cube, etc. Nickname, Fluoroid. 1929 H. L. Bowman Miers's Mineral. (ed. 2) ii. ii. 357 The low four-faced cube {310} occurs as a simple form; {hk0} is so rare in other minerals that it is sometimes known as the ‘fluoroid’. This entry has been updated (OED Third Edition, March 2012; most recently modified version published online March 2022). < n.1850
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