noun
deionized water; DI water
Water purified by ion-exchange resins, used in laboratories, industry, and sometimes in household appliances.
実験にはイオン交換水を使います。
We use deionized water for the experiment.
イオン交換水は純水の一種です。
Deionized water is a type of purified water.
蒸留水 is distilled water, purified by boiling and condensation; イオン交換水 is produced by ion-exchange resins, often used when mineral-free water is needed.
Compound of イオン (ion), 交換 (exchange), and 水 (water), directly describing water treated by ion exchange.