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pinacoid

[pin-uh-koid] /ˈpɪn əˌkɔɪd/
noun, Crystallography
1.
a form whose faces are parallel to two of the axes.
Origin
1875-1880
1875-80; < Greek pinak- (stem of pínax) slab, board + -oid
Related forms
pinacoidal, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for pinacoid
  • It has four prism faces and two pinacoid faces to form a pseudohexagonal crystal.

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