Source : Webster's Revised Unabridged Dictionary (1913)

Carpospore \Car"po*spore\, n. [Gr. karpo`s + -spore.] (Bot.)
   A kind of spore formed in the conceptacles of red alg[ae]. --
   {Car`po*spor"ic}, a.

Source : WordNet®

carpospore
     n : a nonmotile spore of red algae