dispersant

/dɪˈspɜrsənt/
noun
  1. A substance used to break up and spread another substance, especially oil or other pollutants, into small particles.
    • Scientists tested a new dispersant to see how well it works on paint waste.
    • Crews sprayed a chemical dispersant on the oil spill to break it apart.
    • The dispersant helped clean the lake by spreading the pollution over a larger area.
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