Source : Webster's Revised Unabridged Dictionary (1913)

Carpophore \Car"po*phore\, n. [Gr. karpo`s fruit + ? to bear.]
   (Bot.)
   A slender prolongation of the receptacle as an axis between
   the carpels, as in Geranium and many umbelliferous plants.

Source : WordNet®

carpophore
     n : a slender stalk that furnishes an axis for a carpel