Source : Webster's Revised Unabridged Dictionary (1913)

Endorhizal \En`do*rhi"zal\, Endorhizous \En`do*rhi"zous\, a.
   (Bot.)
   Having the radicle of the embryo sheathed by the cotyledon,
   through which the embryo bursts in germination, as in many
   monocotyledonous plants.