Source : Webster's Revised Unabridged Dictionary (1913)

Redwood \Red"wood`\ (-w[oo^]d`), n. (Bot.)
   (a) A gigantic coniferous tree ({Sequoia sempervirens}) of
       California, and its light and durable reddish timber. See
       {Sequoia}.
   (b) An East Indian dyewood, obtained from {Pterocarpus
       santalinus}, {C[ae]salpinia Sappan}, and several other
       trees.

   Note: The redwood of Andaman is {Pterocarpus dalbergioides};
         that of some parts of tropical America, several species
         of {Erythoxylum}; that of Brazil, the species of
         {Humirium}.

Source : WordNet®

Sequoia sempervirens
     n : lofty evergreen of United States coastal foothills from
         Oregon to Big Sur [syn: {California redwood}, {coast
         redwood}]