Francis turbine noun a water turbine designed to produce high flow from a low head of pressure: used esp in hydroelectric power generation Liberaldictionary.com
Word Origin for Francis turbine named after J. B. Francis (1815–92), English-born hydraulic engineer, who invented it Collins English Dictionary – Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012