The Collaborative International Dictionary of English v.0.48:

Mao Tsetung \Mao Tsetung\, Mao Zedong \Mao Zedong\prop. n.
   The leader of the Chinese communist party and later of teh
   People's Repbulic of China; b. 1893, d. 1976. Also referred
   to a simply Mao. [Also spelled Mao Tse-Tung.]
   [WordNet 1.5]