per·chlo·ric acid 
(pər-klôrĭk)
(pər-klôrĭk)n.
A colorless, corrosive liquid, HClO4, explosively unstable under some conditions, that is a powerful oxidant used as a catalyst and in explosives.
- phytopathologic
- phytopathological
- phytopathologist
- phytopathology
- phytophagous
- phytoplankter
- phytoplankton
- phytoplanktonic
- phytoplasma
- phytoplasmic
- phytoremediation
- phytosanitary
- phytosociological
- phytosociologically
- phytosociologist
- phytosociology
- phytosterol
- phytotoxic
- phytotoxicity
- PHz
- pi
- pi
- PI
- pia
- Piacenza