Source : Webster's Revised Unabridged Dictionary (1913)

Silva \Sil"va\, n.; pl. E. {Silvas}, L. {Silvae}. [L., properly,
   a wood, forest.] [Written also {sylva}.] (Bot.)
   (a) The forest trees of a region or country, considered
       collectively.
   (b) A description or history of the forest trees of a
       country.

Source : WordNet®

silva
     n : the forest trees growing in a country or region [syn: {sylva}]
     [also: {silvae} (pl)]

silvae
     See {silva}