† hypo-iˈodic, hyˈpiodic, a. Chem., Obs.
[f. hypo- 5 + iodic.]
In hypo-iodic acid, an old name for periodic oxide.
| 1854 J. Scoffern in Orr's Circ. Sc., Chem. 368 Hypoiodic acid..IO4. 1865–72 Watts Dict. Chem. III. 297 Periodic oxide (Millon's Hypo-iodic acid) IO2 or I2O4. |