notorhizal

from The Collaborative International Dictionary of English v.0.48

Notorhizal \No`to*rhi"zal\ (n[=o]`t[-o]*r[imac]"zal), a. [Gr.
   nw^ton the back + "ri`za a root.] (Bot.)
   Having the radicle of the embryo lying against the back of
   one of the cotyledons; incumbent.
   [1913 Webster]