Search Result for "contraindicate": 
Wordnet 3.0

VERB (1)

1. make a treatment inadvisable;

The Collaborative International Dictionary of English v.0.48:

Contraindicate \Con"tra*in*"di*cate\, v. t. [imp. & p. p. Contraindicated; p. pr. & vb. n. Contraindicating.] (Med.) To indicate, as by a symptom, some method of treatment contrary to that which the general tenor of the case would seem to require; especially, to indicate that a particular method of treatment should not be used; as, penicilin is contraindicated in patients who have shown hypersensitivity. [1913 Webster +PJC] Contraindicating symptoms must be observed. --Harvey. [1913 Webster]
WordNet (r) 3.0 (2006):

contraindicate v 1: make a treatment inadvisable [ant: indicate, suggest]