Definition of bolus noun from the Oxford Advanced Learner's Dictionary

     

    bolus

     noun
    noun
    BrE BrE//ˈbəʊləs//
     
    ; NAmE NAmE//ˈboʊləs//
     
     
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  1. 1 (medical) a single amount of a drug that is given at one time synonym dose
  2. 2(specialist) a small round mass of substance, especially chewed food that is swallowed
  3. Word Origin mid 16th cent. (denoting a large pill): via late Latin from Greek bōlos ‘clod’.
See the Oxford Advanced American Dictionary entry: bolus