merithal

from The Collaborative International Dictionary of English v.0.48

Merithal \Mer"i*thal\, Merithallus \Mer`i*thal"lus\, n. [NL.
   merithallus, fr. Gr. ?, or ?, a part + ? a young shoot.]
   (Bot.)
   Same as {Internode}.
   [1913 Webster]