counterion
noun
coun·ter·ion
ˈkau̇n-tər-ˌī-ən 
-ˌän
: an ion having a charge opposite to that of the substance with which it is associated
Cite this Entry
“Counterion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/counterion. Accessed 28 Nov. 2025.
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