tripinnate

Having bipinnate leaflets or lobes that are themselves pinnately divided, as in the fronds of certain ferns.

In botany, threefold pinnate: noting a leaf in which there are three series of pinnæ or leaflets, as when the leaflets of a bipinnate leaf are themselves pinnate.

Having bipinnate leaflets arranged on each side of a rhachis.

Having bipinnate leaflets arranged on each side of a rhachis.

(of a leaf shape) thrice pinnate