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bolus

noun
/ˈbəʊləs/
/ˈbəʊləs/
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  1. (medical医学) a single amount of a drug that is given at one time(单次给药的)剂量 synonym dose
  2. (specialist) a small round mass of a substance, especially food that has been chewed to make it soft before it is swallowed小团;小丸;(尤指咀嚼后吞咽的)食团
  3. Word Originmid 16th cent. (denoting a large pill): via late Latin from Greek bōlos ‘clod’.

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