Third person singular simple present of to oil.(verb)
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Use "oils" in a sentence
"These oils are distinguished by the name of _drying oils_."
"Family; the Portrait in oils is now (1902) in possession of"
"Weatherbee was a clerk who had known naught but clerking all his life; Cuthfert was a master of arts, a dabbler in oils, and had written not a little."