资料来源 : pyDict

中脉

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Midrib \Mid"rib`\, n. (Bot.)
   A continuation of the petiole, extending from the base to the
   apex of the lamina of a leaf.

资料来源 : WordNet®

midrib
     n : the vein in the center of a leaf [syn: {midvein}]