1. HIO4, but existing in solution usually in hydrated form; used in carbohydrate detection and analysis. SYN: metaperiodic acid. 2. Any of several iodic(VII) acids formed by the combination of iodine heptoxide, I2O7, with water.
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per·iod·ic acid .pər-(.)ī-.äd-ik- n any of the strongly oxidizing iodine-containing acids (as H5IO6 or HIO4)
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per·iod·ic ac·id (per″i-oґdik) a strong mineral acid and oxidizing agent, HIO4.Medical dictionary. 2011.