Pinacoid

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    The face of a crystal parallel to two of the axes.

    "The crystallographic symmetry is initially broken toward dilation symmetry by the splitting of the basal pinacoid or the pseudohexagonal bipyramidal faces of the growing crystal core."

Example

More examples

"The crystallographic symmetry is initially broken toward dilation symmetry by the splitting of the basal pinacoid or the pseudohexagonal bipyramidal faces of the growing crystal core."

Etymology

Ancient Greek πινάκιον (pinákion, “slab, tablet”) + -oid.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.