Source : Webster's Revised Unabridged Dictionary (1913)

Internode \In"ter*node`\, n. [L. internodium; inter between +
   nodus knot.]
   1. (Bot.) The space between two nodes or points of the stem
      from which the leaves properly arise. --H. Spenser.

   2. (Anat.) A part between two joints; a segment;
      specifically, one of the phalanges.

Source : WordNet®

internode
     n : a segment of a stem between two nodes