Emily Dickinson Lexicon

PY-RO-LITH'IC, or PYR-U'RIC, a. [Gr. πυρ, fire, and λιθος, stone.]

The pyrolithic acid is an acid of recent discovery. It is obtained from the silvery white plates which sublime from uric acid concretions, when distilled in a retort. Now considered identical with cyanuric acid.