Quaternate

a. [f. as prec. + -ATE²: cf. F. quaterné.] Arranged in, or forming, a set or sets of four; composed of four parts.

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1753. Chambers, Cycl. Supp., s.v. Leaf.

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1867. J. Hogg, Microsc., II. i. 295. The Sarcina ventriculi, with its remarkable-looking quaternate spores.

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1875. Bennett & Dyer, trans. Sachs’ Bot., 391. With a long stalk and a quaternate lamina.

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Comb. 1829. Loudon, Encycl. Plants, Gloss. 1103/2. Quaternate-pinnate, pinnate, the pinnæ being arranged in fours.

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