antidotal

from WordNet (r) 3.0 (2006)
antidotal
    adj 1: counteracting the effects of a poison
    
from The Collaborative International Dictionary of English v.0.48
Antidotal \An"ti*do`tal\ ([a^]n"t[i^]*d[=o]`tal)(#) a.
   Having the quality an antidote; fitted to counteract the
   effects of poison. --Sir T. Browne. -- {An"ti*do`tal*ly},
   adv.
   [1913 Webster]
    

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