activator
Americannoun
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a person or thing that activates.
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Chemistry, Biochemistry. a catalyst.
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any impurity in a mineral that causes luminescence.
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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 Word Forms
- nonactivator noun
Etymology
Origin of activator
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
It's a small signaling molecule that works as a messenger and activator for the immune system.
From Science Daily • Oct. 17, 2023
Müller says that tirzepatide might be a more potent activator of the GLP-1 receptor, and that GIP might help to make GLP-1’s side effects more tolerable, allowing for higher doses.
From Scientific American • Jan. 10, 2023
They added an activator handle on one end and a four-pronged claw on the other.
From New York Times • Jan. 1, 2023
The binding domain is able to bind the promoter in the absence of the activator domain, but it does not turn on transcription.
From Textbooks • Jun. 9, 2022
She sets the Cog in its installer and presses the activator.
From "The Last Cuentista" by Donna Barba Higuera
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
