a. [ad. late L. quadrangulāris (Boethius), f. quadrangulum: see QUADRANGLE and -AR, and cf. F. quadrangulaire (1542).] Shaped like a quadrangle; having four angles; of four-cornered base or section.

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1592.  G. Harvey, Pierce’s Super. (1593), 20. The Ægyptian Mercury … his Image in Athens was quadrangular.

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1607.  Topsell, Four-f. Beasts (1658), 250. A company of Horses set like a Tower in a Quadrangular form in a field, was called Pergus.

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1611.  Coryat, Crudities, 169. It hath a prety quadrangular Court adjoyning to it.

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1671.  Phil. Trans., VI. 2216. It was a very dark Spot almost of a quadrangular form.

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1776.  Gibbon, Decl. & F., xiii. I. 396. The form was quadrangular, flanked with sixteen towers.

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1784.  Cowper, Task, IV. 217. With spots quadrangular of diamond form.

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1849.  Grote, Greece, II. lviii. VII. 227. The lower part was left as a quadrangular pillar.

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1882.  Miss Braddon, Mt. Royal, III. iii. 47. The little quadrangular garden.

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  Comb.  1656.  Heylin, Surv. France, 74. A house built quadrangular wise.

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  Hence Quadrangularly adv., in the manner of a quadrangle; with four corners. Quadrangularness, the state or fact of being quadrangular (Bailey, vol. II., 1727).

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1708.  Ozell, trans. Boileau’s Lutrin, II. (1730), 125. An inverted Cone … Sharp pointed, and quadrangularly long.

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1875.  H. C. Wood, Therap. (1879), 322. Quadrangularly prismatic crystals.

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