[mid-rib] /ˈmɪdˌrɪb/

noun, Botany.
the central or middle of a leaf.
the main vein of a leaf, running down the centre of the blade
The central or main vein of a leaf, as in eudicots, magnoliids, and ferns. Midribs generally protrude from the underside of leaves with pinnate venation. See more at venation.


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