Medical Dictionary


noun bo·lus \ˈbō-ləs\
plural bo·lus·es

Medical Definition of BOLUS

:  a rounded mass: as a :  a large pill b :  a soft mass of chewed food
a :  a dose of a substance (as a drug) given intravenously b :  a large dose of a substance given by injection for the purpose of rapidly achieving the needed therapeutic concentration in the bloodstream <the patient receives a bolus dose to reach the minimum effective analgesic concentration—J. F. Camp> <subcutaneous injection of a premeal bolus of fast-acting insulin>


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