Simple past tense and past participle of halve.(verb)
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Use "halved" in a sentence
"Underscoring those concerns, South Korea's LG Display Co. said Thursday its third-quarter profit more than halved from the year-earlier period, largely due to weak panel prices as demand for consumer electronics sagged."
"Herceptin halved the chances of cancer recurrence: from one in six to one in 12 after two years."
"I'd wake up to find the kitchen table covered in halved grapefruits."