See Also: quadrilateral(medicine)
quadrilateral(dictionary)
quadrilateral(dictionary)
quadrilateral space(medicine)

quadrilateral (iou)



quadrilateral adjective & noun. M17.
[from late Latin quadrilaterus + -AL1.]
A. adjective. Four-sided; having four sides. M17.
b. noun.
A four-sided figure; a space or area having four sides. M17.
The space lying between and defended by four fortresses; spec. (Hist.) that in northern Italy formed by the fortresses of Mantua, Verona, Peschiera, and Legnano. M19.
Ecclesiastical. The essence of Anglicanism comprising four essential principles, orig. enunciated in 1870 and approved by the Lambeth Conference of 1888 as a basis for the reunion of the Christian Church. Also Lambeth Quadrilateral. L19.
quadrilateralness noun (rare) E18.