† polyˈgonial, a. (n.) Obs.
[f. L. polygōni-us polygonal + -al1.]
a. adj. = polygonal a. b. n. = polygon.
| 1703 T. N. City & C. Purchaser 238 Polygonial Turrets. 1766 Compl. Farmer s.v. Surveying, To find the content of a regular polygonial, or multangular figure. Ibid., [How] to divide triangles, parallelograms, and regular polygonials, in an artifical way. |