/ ˈbəʊləs; NAmE ˈboʊləs/ noun
1.
( medical ) a single amount of a drug that is given at one time
SYN dose
2.
( technical ) a small round mass of substance, especially chewed food that is swallowed
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WORD ORIGIN
mid 16th cent. (denoting a large pill): via late Latin from Greek bōlos clod.