double pinnate (contrast with palmate and pinnate).

Merriam-Webster Online Dictionary
bipinnate (adjective)
twice pinnate
bipinnate (Wikipedia)

The following is a defined list of terms which are used to describe leaf morphology in the description and taxonomy of plants. Leaves may be simple (a single leaf blade or lamina) or compound (with several leaflets). The edge of the leaf may be regular or irregular, may be smooth or bearing hair, bristles or spines. For more terms describing other aspects of leaves besides their overall morphology see the leaf article.

Chart illustrating leaf morphology terms
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