资料来源 : Webster's Revised Unabridged Dictionary (1913)

Arrhizal \Ar*rhi"zal\, Arrhizous \Ar*rhi"zous\, a. [Gr. ? not
   rooted; 'a priv. + ? a root.] (Bot.)
   Destitute of a true root, as a parasitical plant.