octangle

English

Etymology

oct- +‎ angle

Pronunciation
  • enPR: ŏkʹtăng-gl, IPA(key): /ˈɑk.tæŋ.ɡ(ə)l/

Noun

octangle (plural octangles)

  1. A geometric figure with eight corners, an octagon.
    • 1853 May, Weddle, Thomas, “On certain geometrical relations between a surface of the second degree and a tetrahedron whose edges touch the surface”, in The Cambridge and Dublin Mathematical Journal, volume 8, page 130:
      The angles of any two of the tetrahedra ABCD, A′B′C′D′, and OO′O″O‴ form the angles of a complete syngrammatic octangle whose syngrammatic points are the angles of the other tetrahedron […]

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