Definition: Antidotical refers to a substance or element that neutralizes the action of another substance in chemical reactions, making it less reactive or non-reactive. Definition: - Antidotical refers to an element or substance that can neutralize a reaction's effect by reacting with the reactants and preventing them from reacting further. - It is often used in chemistry to prevent reactions from going too far or becoming uncontrolled. Example Usage: For example, in a chemical reaction involving a catalyst (such as FeCl3 in organic synthesis), an antidotical compound can be added to neutralize the effect of the catalyst, allowing it to function more effectively without reacting with itself.