Midrib

[midrib]

解释:

(noun.) the vein in the center of a leaf.

整理:鲁道夫--From WordNet

解释:

(n.) A continuation of the petiole, extending from the base to the apex of the lamina of a leaf.

贝莎整理

解释:

n. (bot.) the continuation of the leaf-stalk to the point of a leaf.

哈蒂编辑