Materialist /(mȧ*tē"rĭ*al*ĭst)/

Ma·te·ri·al·ist

Materialist

n.
  1. One who denies the existence of spiritual substances or agents, and maintains that spiritual phenomena, so called, are the result of some peculiar organization of matter. A believer in philosophical materialism.
  2. One who holds to the existence of matter, as distinguished from the idealist, who denies it.