Artificial intelligent assistant

septangular

septangular, a.
  (sɛpˈtæŋgjʊlə(r))
  [ad. mod.L. *septangulāris, f. septangulus (see prec.).]
  Having seven angles, heptagonal.

1656 Blount Glossogr., Septangular, that hath seven corners, a Septangle. 1682 Grew Anat. Pl. iii. i. i. 104 A great number of Vesicles: of which..some appear Pentangular, others..Septangular. 1819 W. Turton Conchol. Dict. 92 Murex septangularis. Septangular Rock-shell. 1866 B. J. Lossing Hudson (1868) 127 A line of defences in septangular form. 1902 W. L. Newman Politics of Aristotle III. 556 Triangular and septangular harps.

  Hence sepˈtangularness.

1730 Bailey (folio), Septangularness, the having 7 Angles.

Oxford English Dictionary

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