Source : Webster's Revised Unabridged Dictionary (1913)

Rhodosperm \Rho"do*sperm\, n. [Gr. "ro`don the rose + spe`rma a
   seed.] (Bot.)
   Any seaweed with red spores.

   Note: As the name of a subclass, Rhodosperms, or
         {Rhodosperme[ae]}, is synonymous with {Floride[ae]}
         (which see.)