A round mass of something, especially of chewed food in the mouth or alimentary canal.
A single, large dose of a drug, especially one in that form.
To take a bolus (dose) of insulin at a mealtime in order to control one's blood glucose level in diabetes.
To administer (a drug) in bolus dosing, that is, dosing in (one or more) boluses.
The gum, consisting of the tissue surrounding the roots of the teeth and covering the jawbone.