any of a series of acids derived from I 2 O 7 by the addition of water molecules, as HIO 4 or H 5 IO 6 .
Origin
1830-40
British Dictionary definitions for periodic acid
periodic acid
/ˌpɜːraɪˈɒdɪk/
noun
1.
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)
Word Origin
C19: from per- + iodic
periodic acid in Medicine
periodic acid per·i·od·ic acid (pûr'ī-ŏd'ĭk) n. A white, crystalline inorganic acid that contains iodine and is used as an oxidizer.