centinody

from The Collaborative International Dictionary of English v.0.48

Centinody \Cen*tin"o*dy\, n. [L. centum a hundred + nodus knot:
   cf. F. centinode.] (Bot.)
   A weed with a stem of many joints ({Illecebrum
   verticillatum}); also, the {Polygonum aviculare} or
   knotgrass.
   [1913 Webster]