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oil-in-water emulsion

1. n. []

A dispersion of oil droplets into an aqueous medium. This describes an emulsion mud, as contrasted with an invert-emulsion mud. The term should not be used to refer to synthetic-in-water emulsion because a synthetic fluid is not a true oil.

See: demulsifieremulsion mudhydrophile-lipophile balance numberinvert-emulsion oil mudsyn