monopodium

from The Collaborative International Dictionary of English v.0.48

Monopodium \Mon`o*po"di*um\, n.; pl. L. {Monopodia}, E. {-ums}.
   [L. See {Monopody}.] (Bot.)
   A single and continuous vegetable axis; -- opposed to
   {sympodium}.
   [1913 Webster]