the GNU version of the Collaborative International Dictionary of English
n. Abbreviation of pyrogallic acid.
The Century Dictionary and Cyclopedia
An element in many words of Greek origin or formation, meaning ‘fire.’
n. In photography, an abbreviation of pyrogallol.
Word Usage
"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."