Definition of "hydro" []

• Hydroelectric. (adjective)
• Hydroelectric power. (noun)
• A hydroelectric power plant. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Instead of steel armor, M. Tommasi has a new invention which he calls hydro-metallic plating."
• ""This is what we call a hydro-electric bath," Josephson explained."
• "Oklahoma-based Syntroleum Corp. converts chicken fat into synthetic fuel, using a process it calls hydro-processing."