Artificial intelligent assistant

siseangle

† siseangle Obs. rare.
  [f. sise sice + angle.]
  A hexagon. So † siseangled a.

1551 Recorde Pathw. Knowl. i. Def., Likewyse shall you iudge of siseangles, which haue sixe corners. 1567 ― Whetst. C iij, Quadrate, Cinkeangeled, Siseangeled.

Oxford English Dictionary

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