side effect


side effect

noun

: an often harmful and unwanted effect of a drug or chemical that occurs along with the desired effect

: a result of an action that is not expected or intended

Full Definition of SIDE EFFECT

:  a secondary and usually adverse effect (as of a drug) <toxic side effects> —called also side reaction

Examples of SIDE EFFECT

  1. Nausea and diarrhea are the side effects of the drug.
  2. the harmful side effects of using chemicals to kill insects
  3. The merger created positive side effects for both companies.

First Known Use of SIDE EFFECT

1884

side effect

noun    (Medical Dictionary)

Medical Definition of SIDE EFFECT

: a secondary and usually adverse effect (as of a drug) <toxic side effects> <a side effect of drowsiness caused by antihistamines>—called also side reaction

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