Source : Webster's Revised Unabridged Dictionary (1913)

Lithophyte \Lith"o*phyte\, n. [Litho- + Gr. ? plant: cf. F.
   lithophyte.] (Zo["o]l.)
   A hard, or stony, plantlike organism, as the gorgonians,
   corals, and corallines, esp. those gorgonians having a
   calcareous axis. All the lithophytes except the corallines
   are animals.

Source : WordNet®

lithophyte
     n : plant that grows on rocks or stony soil and derives
         nourishment from the atmosphere [syn: {lithophytic plant}]