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Use "rancidity" in a sentence
"Some foods, especially those that have a high fat content or those with delicate flavours and aromas, are susceptible to oxidation (attack by air which causes off flavours to develop, known as rancidity)."
"Rancidity is the key factor - rancidity occurs when oxygen interacts with the oil."
"It also solved the problem of eliminating certain objectionable features of fats in general, such as rancidity, color, odor, smoking properties when heated."