pinacoidaladj.

Brit.

/pɪnəˈkɔɪdl/, U.S.

/ˌpɪnəˈkɔɪd(ə)l/

Forms: see pinacoid n. and -al suffix¹

Origin: Formed within English, by derivation. Etymons: pinacoid n., -al suffix¹.

Etymology: < pinacoid n. + -al suffix¹.In form pinakoidal after ancient Greek πινακ-, πίναξ pinax n.

Crystallography.

Of the nature of or relating to a pinacoid; = pinacoid n.; spec. designating a triclinic crystal form having a centre of symmetry; (of cleavage) occurring parallel to one of the pinacoidal surfaces of a crystal. Cf. pedial adj.

ΘΚΠ

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

secondary1816

trapezian1816

triacontahedral1816

tri-dodecahedral1816

tri-hexahedral1816

tri-octahedral1816

tri-rhomboidal1816

octodecimal1817

octoduodecimal1817

octosexdecimal1817

pentahexahedral1817

octahedrala1824

trigonal1878

pinacoidal1879

tetartopyramid1891

trisoctahedral1891

tetartohexagonal1895

tetartosystematic1895

1879 F. Rutley Study of Rocks xiii. 245 A structural condition of pinakoidal separation.

1900 Proc. Royal Soc. 67 477 The larger grains prove to be generally diallage..with a close pinacoidal cleavage.

1926 Proc. Royal Soc. A. 112 447 These measurements correspond to a triclinic pinakoidal unit.

1940 F. F. Grout Kemp's Handbk. Rocks (ed. 6) i. 16 When pinacoidal cleavages appear in addition to the prismatic ones in pyroxenes, they are called diallage.

1990 C. Pellant Rocks, Minerals & Fossils 73/1 Witherite. Chemistry: BaCO₃. System: Orthorhombic... Cleavage: pinacoidal.

This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022).

单词	pinacoidal
释义	pinacoidaladj. Brit. /pɪnəˈkɔɪdl/, U.S. /ˌpɪnəˈkɔɪd(ə)l/ Forms: see pinacoid n. and -al suffix¹ Origin: Formed within English, by derivation. Etymons: pinacoid n., -al suffix¹. Etymology: < pinacoid n. + -al suffix¹.In form pinakoidal after ancient Greek πινακ-, πίναξ pinax n. Crystallography. Of the nature of or relating to a pinacoid; = pinacoid n.; spec. designating a triclinic crystal form having a centre of symmetry; (of cleavage) occurring parallel to one of the pinacoidal surfaces of a crystal. Cf. pedial adj. ΘΚΠ the world > matter > chemistry > crystallography (general) > crystal (general) > specific crystal forms > [adjective] > miscellaneous others secondary1816 trapezian1816 triacontahedral1816 tri-dodecahedral1816 tri-hexahedral1816 tri-octahedral1816 tri-rhomboidal1816 octodecimal1817 octoduodecimal1817 octosexdecimal1817 pentahexahedral1817 octahedrala1824 trigonal1878 pinacoidal1879 tetartopyramid1891 trisoctahedral1891 tetartohexagonal1895 tetartosystematic1895 1879 F. Rutley Study of Rocks xiii. 245 A structural condition of pinakoidal separation. 1900 Proc. Royal Soc. 67 477 The larger grains prove to be generally diallage..with a close pinacoidal cleavage. 1926 Proc. Royal Soc. A. 112 447 These measurements correspond to a triclinic pinakoidal unit. 1940 F. F. Grout Kemp's Handbk. Rocks (ed. 6) i. 16 When pinacoidal cleavages appear in addition to the prismatic ones in pyroxenes, they are called diallage. 1990 C. Pellant Rocks, Minerals & Fossils 73/1 Witherite. Chemistry: BaCO₃. System: Orthorhombic... Cleavage: pinacoidal. This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022). < adj.1879
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