Definitions
from The Century Dictionary.
- noun In crystallography, a plane parallel to two of the crystallographic axes: as, the basal pinacoid, or base parallel to the lateral axes.
- noun Some authors extend the use of this term to embrace any form which has but two parallel faces; according to this usage, all the possible faces of a holosymmetric triclinic crystal are called
pinacoids .
from the GNU version of the Collaborative International Dictionary of English.
- noun (Crystallog.) A plane parallel to two of the crystalline axes.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun crystallography The
face of a crystal parallel to two of theaxes .
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
Ancient Greek πινάκιον (pinakion, "slab, tablet") + -oid.
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Examples
-
r {100}; and the crystal of tabular habit represented in fig. 6 is a combination of the basal pinacoid c {111}, prism m {2-1-1}, and rhombohedron e {110}.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" Various
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e, which are common in the lead mines of Alston Moor in Cumberland; slate-spar (German _Schieferspath_) for crystals of tabular habit, and sometimes as thin as paper: cannon-spar for crystals of prismatic habit terminated by the basal pinacoid c.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" Various
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