In botany or zoology, having a double-feathered or twice-branching pattern; doubly pinnate.
From 'dupli-' (double) combined with 'pennate' (feathered or wing-like, from Latin 'penna' meaning feather). Describes structures with branching patterns resembling feathers arranged twice over.
Look at a fern frond under magnification—the leaves branch in a pattern called 'duplicipennate' because the main stem branches, and those branches branch again, creating this stunning fractal-like geometry!
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