Definition of Activation

1. Noun. Stimulation of activity in an organism or chemical.

Specialized synonyms: Indweller
Generic synonyms: Stimulation
Derivative terms: Activate, Activate, Activate, Activate
Antonyms: Inactivation

2. Noun. The activity of causing to have energy and be active.
Exact synonyms: Activating, Energizing
Generic synonyms: Activity
Specialized synonyms: Electrification, Animation, Invigoration, Vivification
Derivative terms: Energize, Energize

3. Noun. Making active and effective (as a bomb).
Generic synonyms: Beginning, Commencement, Start
Derivative terms: Activate
Antonyms: Deactivation

Definition of Activation

1. Noun. Making active and effective. ¹

2. Noun. (physics) The process of making a radioisotope by bombarding a stable element with neutrons or protons. ¹

¹ Source:

Definition of Activation

1. [n -S]

Medical Definition of Activation

1. Activation occurs when a particle interacts with an atomic nucleus, shifting the nucleus into an unstable state, and causing it to become radioactive. In fusion research, where deuterium-tritium is a common fuel mixture, the neutron released when (D + T) combine to form (4He + n) can activate the reactor structure. In this case the 4He is inert, the neutron sticks to another nucleus, and the neutron + nucleus reaction creates an actvation product. Sometimes called radioactivation. See: activation product, activation analysis. (09 Oct 1997)

Lexicographical Neighbors of Activation

activated complex
activated fatty acid
activated glucose
activated macrophage
activated partial thromboplastin time
activated resin
activated sludge
activated sludge method
activated sludge process
activated state
activating agent
activation (current term)
activation analyses
activation analysis
activation energy
activation product
activation record
activator appliances
active acetate

Literary usage of Activation

Below you will find example usage of this term as found in modern and/or classical literature:

1. Molecular Neurobiology: Proceedings of the Second Nimh Conference by Steven Zalcman (1995)
"activation of the KA£.ft channel by ßy was neither due to the detergent CHAPS nor ... The channel activation was prevented by Incubating ßy with a0-GDP, ..."

2. Problems of Fertilization by Frank Rattray Lillie (1919)
"CHAPTER VII THE PROBLEM OF activation The egg may be activated, caused to develop, either by fertilization or by various artificial means that produce ..."

3. Journal of the American Chemical Society by American Chemical Society (1879)
"The volume of activation may be positive, negative, or zero, ... These activation parameters are thermodynamic excess functions which distribute themselves ..."

4. Oxygen/Nitrogen Radicals and Cellular Injury edited by Kenneth B. Adler, Robert D. Devlin, Val Vallyathan (2000)
"These results may help to distinguish effects typical of kinase activation by oxidative stress from those mediated solely by FTP inhibition; alternatively, ..."

5. Science by American Association for the Advancement of Science (1919)
"In solutions of copper salts the precise activation-time can be measured with accuracy in a single wire if the wire is kept under close observation, ..."

6. Biological Bulletin by Marine Biological Laboratory (Woods Hole, Mass.) (1915)
"REVERSIBLE activation AND INCOMPLETE MEMBRANE FORMATION OF THE UNFERTILIZED ... The writer showed in 1913 that the artificial activation of the egg can be ..."

7. A Lifelong Passion: Nicholas and Alexandra: Their Own Story by Andrei Maylunas (2005)
"Under normal circumstances following tacrine the predominant effect of the elevated levels of acetylcholine will be activation of inhibitory presynaptic ..."

Other Resources:

Search for Activation on!Search for Activation on!Search for Activation on Google!Search for Activation on Wikipedia!