Search Result for "midrib": 
Wordnet 3.0

NOUN (1)

1. the vein in the center of a leaf;
[syn: midrib, midvein]



The Collaborative International Dictionary of English v.0.48:

Midrib \Mid"rib`\, n. (Bot.)
   A continuation of the petiole, extending from the base to the
   apex of the lamina of a leaf.
   [1913 Webster]


WordNet (r) 3.0 (2006):

midrib
    n 1: the vein in the center of a leaf [syn: midrib, midvein]