The quality or state of being reactive.

One who, or that which, reactivates. / (chemistry, engineering) A device that removes hydrogen sulfide from a solution.

plural of reactivator

Capable of being reactivated.

plural of reactiveness

plural of reactivant

That which reactivates

(chemistry) A short-lived compound that is formed temporarily in a reaction mechanism.

US standard spelling of reactive armour.

Vehicle armor which reacts to the impact of a weapon in such a way as to reduce the damage done, typically by exploding to disrupt the penetrating jet of a shaped-charge weapon.