Definition of "bolus"

bolus

/ˈbəʊləs/

noun
plural boli or boluses
1. A round mass of something, especially of chewed food in the mouth or alimentary canal.
2. A single, large dose of a drug, especially one in that form.
  Quotations
  I gave him a bolus, twice the size of a gooseberry.
  1863, Sheridan Le Fanu, The House by the Churchyard
verb
third-person singular simple present boluses, present participle bolusing, simple past and past participle bolused
1. (transitive) To administer (a drug) in bolus dosing, that is, dosing in (one or more) boluses.
2. (intransitive) To take a bolus (dose) of insulin at a mealtime in order to control one's blood glucose level in diabetes.