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Related to activating: validating, affirming


1. To render active.
2. To make radioactive.


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.


See activation.


(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


1. To render active.
2. To make radioactive.

activate (ak´tivāt),

v in orthodontics, to adjust an appliance so that it will exert effective force on the teeth and jaws.

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.

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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 ?
We hypothesize that by activating PPAR[gamma], MEHP disrupts the critical timing of the growth and differentiation of the ovarian follicle.
Activating computer monitor power management sleep settings saves energy by allowing monitors to go into a low-power "sleep" mode when inactive.
The launch was marked with a ceremony activating service for financial services company Platan Group for several of its offices in Warsaw.
Her research has demonstrated significant recovery of neurological function in animal models of spinal cord injury by activating and administering macrophages, a type of immune cell.
Previously, Ligand scientists have shown that compounds capable of activating the RXR homodimer (such as the RXR agonist LG100268) also serve as insulin sensitizers by activating the RXR:PPAR(gamma) heterodimer by binding to RXR.

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