Simple past tense and past participle of acidulate.(verb)
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Use "acidulated" in a sentence
"The poaching in acidulated water worked fine, and is a lot easier on my arteries to boot."
"While the pork is cooking, peel the quince, cut them into quarters, remove the core, and drop in acidulated water (water with lemon juice) to keep the quince from turning brown."
"Of the more substantial dishes the most pleasing was some crisp-skinned but rare trout with bright orange roe and an acidulated julienne of crunchy vegetables."