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1. To render active.
2. To make radioactive.
Farlex Partner Medical Dictionary © Farlex 2012


tr.v. acti·vated, acti·vating, acti·vates
1. To set in motion; make active or more active.
2. Biology To convert (certain biological compounds) into biologically active derivatives.

ac′ti·va′tion n.
ac′ti·va′tor n.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.


(1) To render something active.
(2) To make something radioactive.
Chemistry To convert a compound—e.g., a provitamin or enzyme—into an active form or different compound, in particular one that has a specific biologic action
Example, activation by UV light Ergosterol, lumisterol, tachysterol, vitamin D2
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.


1. To render active.
2. To make radioactive.
Medical Dictionary for the Dental Professions © Farlex 2012

Patient discussion about activate

Q. Are there any nice activities for adults with autism? I've been helping a very nice man of 45 of years old and I'm looking for some new things I can do with him in our time together. any ideas?

A. Autistic people react wonderfully with animals. for instance- i saw a group of severe Autistic teenagers going to swim with dolphins. the effect was amazing! taking him to the zoo, or even to the park to feed ducks, pet dogs, whatever.. could have a great effect on him.
hope i helped!
tell me how it went.

Q. what is a passive smoking? and is it dangerous as an active?

A. Passive smoking is the exposure to cigarettes smoke emitted from cigarettes smoke by other person. It's dangerous and may increase the risk to several diseases similar to active smoking (one's exposure to smoke emitted from the cigarettes he or she is smoking) although the risk is of lower magnitude. Example for passive smoking is children of smokers etc.

You may read more here:

Q. i swim a lot ! what are the advantages of swimming over other sport activities? on what part of the body does it work the most ?

A. its a good workout but your not really going to burn as much calories as a regular work out.

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References in periodicals archive ?
Various regulating authorities have made stringent regulations for environmental pollution control and have promoted activated carbon in water and air treatment plants, which in turn is estimated to propel the activated carbon market over the forecasted period.
Activated charcoal powder is thought to be able to disrupt intestinal gas, although researchers still do not understand how.
The Philippines, to note, has been exporting activated carbon for over five decades already, according to industry sources.
But due to its ability to absorb impurities, activated charcoal has been assigned a wide range of health benefits, not all of them accurate.
And the FineVine Activated Charcoal Mud Mask is by far one of the best options in this regard.
Schmidt's Tooth + Mouth Pastes are available in four flavors: Activated Charcoal, Wondermint, Vanilla Chai and Coconut + Lime.
The preparation, characterization, and application of activated carbons in the amoxicillin has been studied by many reasearchers.
She adds: "There are many outlandish claims made about activated charcoal and its use as a supplement - however, it's important to remember most of these claims do not have any evidence behind them.
Activated carbon is applied widely in a variety of fields such as food and chemical industries, wastewater treatment, solvent recovery, air pollution control and hyrometallurgy for the recovery of gold and silver [2].
In the U.S., nearly all Apple iPhones have an FM chip installed that has not been activated.
Environmental Engineering and Activated Sludge Processes: Models, Methodologies, and Applications
A new pedestrian- activated "HAWK" light will be activated Thursday on East Broadway between Patterson and Ferry streets, city of Eugene officials said.