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isoionic point

American  
[ahy-soh-ahy-on-ik, ahy-soh-] / ˈaɪ soʊ aɪˈɒn ɪk, ˌaɪ soʊ- /

noun

Chemistry.
  1. the hydrogen ion concentration at which the concentration of the dipolar ion is at a maximum.


Etymology

Origin of isoionic point

First recorded in 1930–35; iso- + ionic