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n opposition to; to hinder, defeat, or frustrate, by contrary agency or influence; as, to counteract the effect of medicines; to counteract good advice.

Action in opposition; hindrance resistance. [They] do not . . . overcome the counteraction of a false principle or of stubborn partiality. Johnson.

Tending to counteract.

By counteraction.

Expelling or counteracting poison; antidotal.

Counteractive of acidity.

Opposition of action; counteraction or contrariety of things or principles.

Antagonistic; opposing; counteracting; as, antagonist schools of philosophy.

To contend with; to oppose actively; to counteract.

Anything that neutralizes, or that counteracts an alkaline tendency in the system. Hoopplw.

Of power to counteract alkalies.

Counteractive of bilious complaints; tending to relieve biliousness.

Having the quality an antidote; fitted to counteract the effects of poison. Sir T. Browne. -- An"ti*do`tal*ly, adv.

A remedy to counteract the effects of poison, or of anything noxious taken into the stomach; -- used with against, for, or to; as, an antidote against, for, or to, poison.

Counteracting or preventing hydrophobia. -- n.

Counteractive of hypochondria. -- n.

Counteracting hysteria. -- n.

Counteracting, or deemed of use in, diseases of the kidneys. -- n.

Counteracting inflammation.

Counteracting, or preserving from, putrefaction; antiseptic.