adj. Having bipinnate leaflets arranged on each side of a rhachis.
the GNU version of the Collaborative International Dictionary of English
adj. Having bipinnate leaflets arranged on each side of a rhachis.
The Century Dictionary and Cyclopedia
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.
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