microemulsion

noun
mi·​cro·​emulsion | \"+\

Definition of microemulsion 

: an emulsion in which the dispersed phase is in the form of very small droplets usually produced and maintained with the aid of surfactants and having diameters of from 50 to 500 angstroms

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First Known Use of microemulsion

1966, in the meaning defined above

History and Etymology for microemulsion

micr- + emulsion

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The first known use of microemulsion was in 1966

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