(organic chemistry) Any of a wide range of techniques, often using catalysts, in which a carbon to hydrogen covalent bond of an organic compound is made to cleave in order to replace the hydrogen with a functional group.

Alternative form of reactivate

plural of ultrahazardous activity

(law) An activity that is so dangerous that any person engaging in it will be held strictly liable for harm caused by engaging in the activity, no matter what precautions were taken to prevent harm; common examples include using explosives, radiation, and poisonous chemicals, and handling wild animals.

(management) The risk of employees spending significant effort looking busy with an activity at the expense of measuring progress toward what the activity is ultimately supposed to achieve.

That responds to spoken commands.

plural of CH activation

plural of hive of activity

(idiomatic) A very busy place.

plural of activity trap