bolus

noun
bo·lus | \ ˈbō-ləs \
plural boluses

Definition of bolus 

1 : a rounded mass: such as

a : a large pill

b : a soft mass of chewed food

2 medical

a : a dose of a substance (such 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

Examples of bolus in a Sentence

Recent Examples on the Web

In manual mode, there’s what’s known as a dual-wave bolus that allows you to fine-tune doses to reflect different foods or circumstances. David Lazarus, latimes.com, "Cutting-edge tech makes diabetes management easier (and less painful) than ever," 7 June 2018 But true mastery of the subject requires not only a big bolus of math and physics but a whopping expansion of one’s inner vision. Alan Hirshfeld, WSJ, "The Greatest Show on Earth," 11 Aug. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'bolus.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of bolus

1562, in the meaning defined at sense 1

History and Etymology for bolus

Late Latin, from Greek bōlos lump

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Time Traveler for bolus

The first known use of bolus was in 1562

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More Definitions for bolus

bolus

noun
bo·lus | \ ˈbō-ləs \
plural boluses

Medical Definition of bolus 

1 : a rounded mass: as

a : a large pill

b : a soft mass of chewed food

2a : 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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WORD OF THE DAY

occurring twice a year or every two years

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