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activator

[ak-tuh-vey-ter] /ˈæk təˌveɪ tər/
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.
Origin
Related forms
nonactivator, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for activator
  • It's an enzyme activator, a cell growth factor, and a component of cell membranes.
activator in Medicine

activator ac·ti·va·tor (āk'tə-vā'tər)
n.

  1. An agent that renders another substance active or accelerates a process or reaction.

  2. The fragment produced by chemical cleavage of a proactivator that induces the enzymatic activity of another substance.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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