Triquetrous

//tɹaɪˈkwɛtɹəs// adj

Definitions

Adjective
  1. 1
    Triangular; especially (in natural sciences), having a triangular cross-section.

    "the lithostrata or figured pavements of the ancients […] consisted not all of square stones, but were divided into triquetrous segments, honey-combs, and sexangular figures, according to Vitruvius"

Etymology

From Latin triquetrus.

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