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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 ?
In consideration for the acquisition of Activate (the "Transaction"), UMG will issue 2,333,333 Common Shares at a price of $0.30 per share.
With many more planned additions to Activate we look forward to your support, so watch this space and get Activated!!
Low doses of the endocrine disruptor bisphenol-A and the native hormone 17beta-estradiol rapidly activate transcription factor CREB.
Because only Cu and V showed significant vasoconstrictor activity, we determined whether or not Cu and V could activate ERK1/2 and p38 MAPK.
The compounds used for the exposure experiments of transgenic animals were also tested in an in vitro assay to separately assess their potency to activate ER-[alpha] or ER-[beta] using a similar reporter gene as used in the transgenic animals, only without the flanking insulator sequences (Figure 5).
The demonstration that many PCBs block SXR in humans rather than activate it--as previously thought, based on animal models--challenges the assumption that animal models extrapolate to humans.
From these results, the scientists speculate that adding alcohol to inflamed or damaged tissue produces a situation in which a person's body temperature activates VR1 and creates a painful, burning sensation.
Therefore, DNA damage induced by chrysotile exposure might activate the signaling pathways leading to PIKK activation, and resultant p53 activation might contribute to the protection of cells from fatal genetic injury.
Activate's software, which automates and delegates common IT tasks to the business, has been the perfect solution for many organizations who are trying to 'do more with less' in the recent tough economic times.
The new research shows that these drugs, known as imidazoquinolines, appear to activate toll-like receptor 7 (TLR7), a protein on immune cells.
Berkeley, CA, September 20, 2012 --( Activate Version 5 Customer Preview
MEHP is unique among the phthalates in its suppression of aromatase and in its ability to activate peroxisome proliferator-activated receptors (PPARs).