† octahedridadj.

Origin: Formed within English, by derivation. Etymons: octahedron n., -id suffix².

Etymology: < octahedron n. + -id suffix². N.E.D. (1902) gives the pronunciation as (ǫktăhī·drid, -he·drid) /ɒktəˈhiːdrɪd/ /-ˈhɛdrɪd/.

Crystallography. Obsolete. rare.

Of a plane: intersecting all three coordinate axes. Cf. pinacoid adj., prismatoid adj. 1.So called because a group of eight such planes would form an octahedron.

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octahedrid1895

1895 N. Story-Maskelyne Crystallogr. ii. §18 20 A plane of such a group, whatever the axial system, has been designated as an Octaid, or, more correctly, an Octahedrid plane.

This entry has been updated (OED Third Edition, March 2004; most recently modified version published online June 2018).

单词	octahedrid
释义	† octahedridadj. Origin: Formed within English, by derivation. Etymons: octahedron n., -id suffix². Etymology: < octahedron n. + -id suffix². N.E.D. (1902) gives the pronunciation as (ǫktăhī·drid, -he·drid) /ɒktəˈhiːdrɪd/ /-ˈhɛdrɪd/. Crystallography. Obsolete. rare. Of a plane: intersecting all three coordinate axes. Cf. pinacoid adj., prismatoid adj. 1.So called because a group of eight such planes would form an octahedron. ΘΚΠ the world > matter > chemistry > crystallography (general) > crystal (general) > crystals (other miscellaneous) > [adjective] > crystal planes octahedrid1895 1895 N. Story-Maskelyne Crystallogr. ii. §18 20 A plane of such a group, whatever the axial system, has been designated as an Octaid, or, more correctly, an Octahedrid plane. This entry has been updated (OED Third Edition, March 2004; most recently modified version published online June 2018). < adj.1895
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