The Collaborative International Dictionary of English v.0.48:

Yangtze \Yang"tze\, prop. n.
   1. a major river of Asia, which flows into the East China
      Sea.

   Syn: Yangtze River.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Yangtze
    n 1: the longest river of Asia; flows eastward from Tibet into
         the East China Sea near Shanghai [syn: Chang Jiang,
         Changjiang, Chang, Yangtze, Yangtze River, Yangtze
         Kiang]