activator

[ ak-tuh-vey-ter ]

noun

1. a person or thing that activates.
2. Chemistry, Biochemistry. a catalyst.
3. any impurity in a mineral that causes luminescence. Compare inhibitor ( def 3 ).
4. Orthodontics. a removable appliance, usually of hard plastic, that is worn in the mouth instead of a fixed appliance to help align the teeth and improve the relationship of the lower jaw to the upper.

Other Words From

• non·acti·vator noun

Word History and Origins

Origin of activator¹

activate + -or ²

Example Sentences

One of the key activators that tells satellite cells to build new muscle is HGF.

From Science Daily

Meanwhile, Mr Verrett says on his site that he is a sixth generation shaman, “servant of god and energy activator” who “demystifies spirituality” through his “no-nonsense teachings”.

From BBC

Recently introduced immune activator therapeutic monoclonal antibodies for cancer are attempting to break this hiding process.

From Science Daily

The models also showed that the loop's flexibility is what allows KIN10 to interact with an activator protein to trigger the cascade of reactions that ultimately shut down oil production and plant growth.

From Science Daily

In this regard, the availability of EOs makes them attractive candidates as environmentally friendly plant defense activators.

From Science Daily