river in SE Tex., flowing into Galveston Bay: in a battle (1836) near its mouth, troops under Sam Houston won Tex. from Mexico: 100 mi (161 km)
See San Jacinto in American Heritage Dictionary 4
(săn jə-sĭnˈtō)
A river, about 209 km (130 mi) long, of southeast Texas flowing into Galveston Bay. The final battle of the Texas Revolution, in which insurgents under Sam Houston defeated the Mexican forces led by Santa Anna, was fought on its banks on April 21, 1836.