bolus


bo·lus

noun \ˈbō-ləs\
plural bo·lus·es

Definition of BOLUS

1
: a rounded mass: as a : a large pill b : a soft mass of chewed food
2
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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