Petroleum is the raw material refined into various fuels and needed for countless chemicals.
1962 October, “Talking of Trains: New yard at Scunthorpe”, in Modern Railways, page 221:
The three main firms […] are increasing their output capacity and it is estimated that by 1964-5 railborne traffic will be about a third greater than the 1960 figure, reaching a total of something like 13½ million tons per annum, of which some 70 per cent will be inwards raw materials for these firms.
(figuratively) Any physical product serving as input to a factory or other installation which processes it.
The assembly plant's raw materials are finished parts from Asian suppliers.
2024 October, “Water Treatment Competition”, in ASCE[1], page 11:
Teams will place all their unassembled raw materials and tools in the competition area along with two provided 5-gallon buckets of contaminated water and two provided stirring sticks.
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