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counter-ion

American  
[koun-ter-ahy-uhn, -ahy-on] / ˈkaʊn tərˌaɪ ən, -ˌaɪ ɒn /

noun

Physical Chemistry.

  1. an ion in solution that associates itself with an ion of opposite charge on the surface of a member of a solute.

Etymology

Origin of counter-ion

counter- + ion

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.