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per·iod·ic acid | \ ˌpər-(ˌ)ī-ˈä-dik- 
\
\Definition of periodic acid
: any of the strongly oxidizing acids (such as H5IO6 or HIO4) that are the most highly oxidized acids of iodine
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periodic acid
nounper·iod·ic acid | \ ˌpər-(ˌ)ī-ˌäd-ik- \
\Medical Definition of periodic acid
: any of the strongly oxidizing iodine-containing acids (as H5IO6 or HIO4)
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