Midrib and Nervure

Midrib noun - The vein in the center of a leaf.

Nervure and midrib are semantically related. In some cases you can use "Nervure" instead a noun "Midrib".

Nervure noun - Any of the vascular bundles or ribs that form the branching framework of conducting and supporting tissues in a leaf or other plant organ.

Midrib and nervure are semantically related. Sometimes you can replace term "Midrib" with "Nervure", this nouns are similar.