Simple past tense and past participle of mill.(verb)
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Use "milled" in a sentence
"Red Fife: A whole-grain flour milled from the organically grown heritage wheat that is the genetic parent to wheat grown in North America."
"According to the Forest Products Laboratory, a whole, unmilled tree can support 50 percent more weight than the largest piece of lumber milled from the same tree."
"The curved fins are glue-laminated pine, plantation poplar has been used for the slats and redwood milled from the site used in the walkway balustrading."