Medical Dictionary


noun \ˈi(ə)l\

Medical Definition of OIL

:  any of numerous unctuous combustible substances that are liquid or can be liquefied easily on warming, are soluble in ether but not in water, and leave a greasy stain on paper or cloth—see essential oil, fatty oil, volatile oil
:  a substance (as a cosmetic preparation) of oily consistency <bath oil>
oil adjective
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