Hypertext Webster Gateway: "contraindication"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Contraindication \Con"tra*in`di*ca"tion\, n. (med.)
An indication or symptom which forbids the method of
treatment usual in such cases.
From WordNet (r) 1.7 (wn)
contraindication
n : (medicine) a reason that makes it inadvisable to prescribe a
particular drug or employ a particular procedure or
treatment [ant: {indication}]
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