cation exchange resin
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Related to cation exchange resin: anion exchange resin
cation exchange resin[′kat‚ī·ən iks′chānj ′rez·ən]
A highly polymerized synthetic organic compound consisting of a large, nondiffusible anion and a simple, diffusible cation, which later can be exchanged for a cation in the medium in which the resin is placed.