Having a structure like a feather where the branches are themselves divided in a feather-like pattern, creating a twice-feathered appearance.
From 'bi-' (two) and 'pinnate' (feather-like), describing botanical structures with a double level of feathering.
Many ferns have bipinnated leaves that look like delicate feathers made of smaller feathers—nature's fractal design that's been winning for over 300 million years!
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