In botany, describing a leaf with veins that form a net-like or reticulate pattern of branching throughout the leaf structure.
From Greek 'dictyon' (net/mesh) and 'dromos' (running/course), with the suffix '-ous.' The term literally means 'having veins that run in a net-like pattern,' describing the branching network of vascular tissues visible in many dicot leaves.
If you look at a maple or oak leaf carefully, you can see how the veins split and reconnect in a complex mesh pattern—that's dictyodromous venation, and it's actually more efficient at distributing water and nutrients throughout the leaf than simpler vein patterns.
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