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The Adobe Flash Player is required in order to view this content. You can get it here: petrochemicalOne entry found. Main Entry: pet·ro·chem·i·cal Pronunciation: \ˌpe-trō-ˈke-mi-kəl\ Function: noun Date: 1942 : a chemical isolated or derived from petroleum or natural gas — pet·ro·chem·is·try \-ˈke-mə-strē\ noun 
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