Source : Webster's Revised Unabridged Dictionary (1913)

Ivory \I"vo*ry\, n.; pl. {Ivories}. [OE. ivori, F. ivoire, fr.
   L. eboreus made of ivory, fr. ebur, eboris, ivory, cf. Skr.
   ibha elephant. Cf. {Eburnean}.]

Source : WordNet®

ivory
     n 1: a hard smooth ivory colored dentine that makes up most of
          the tusks of elephants and walruses [syn: {tusk}]
     2: a shade of white the color of bleached bones [syn: {bone}, {pearl},
         {off-white}]