|periodic acid (ˌpɜːraɪˈɒdɪk)|
|any of various oxyacids of iodine containing a greater proportion of oxygen than iodic acid and differing from each other in water content, esp either of the crystalline compounds HIO4 (metaperiodic acid) and H5IO6 (paraperiodic acid)|
|[C19: from |
periodic acid per·i·od·ic acid (pûr'ī-ŏd'ĭk)
A white, crystalline inorganic acid that contains iodine and is used as an oxidizer.