Midrib

/ˈmɪdrɪb/ noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    The strengthened vein down the middle of a flower petal or simple leaf or leaflet.
  2. 2
    the vein in the center of a leaf wordnet
  3. 3
    The continuation of the petiole of a pinnately compound leaf around which the leaflets attach.

Etymology

mid- + rib

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