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mineral rubber

noun
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Definition of mineral rubber

1 : any of various rubbery substances of mineral origin (as asphalt)
2 : an artificial asphalt obtained usually by blowing petroleum residues with air and used in compounding rubber and in insulation — compare blown oil sense 2

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“Mineral rubber.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mineral%20rubber. Accessed 28 Oct. 2020.

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