长三角 chángsānjiǎo Yangtze River Delta Origin Definitions Defs Strokes Stroke Words Sentences Sents 长 長 cháng abbreviation of 长江 長江 chángjiāng Yangtze River The Yangtze River, China's longest river and the third longest in the world.三角 sānjiǎo abbreviation of 三角洲 sānjiǎozhōu delta the landform at the mouth of a river formed by the accumulation of sediment, typically triangular or fan-shaped