Definition of "pyro" [py•ro]

• Slang A person who has a compulsion to set fires; a pyromaniac. (noun)
• Slang A display of pyrotechnics. (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.

• "The Iranians were conducting so-called pyro-processing experiments to remove impurities from uranium metal, thus opening another route for the mullahs to build a nuclear device."
• "I've mentioned 26 what I would call pyro events that have to happen."
• "Carving techniques include scratching on the outer shell, fine-line hatching or a combination of what is known as pyro-engraving to create geometric drawings and iconographic scenes."