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Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To time-release

of or relating to a preparation that gradually releases an active substance (especially a drug) over a period of time 
WordNet® 3.0, © 2006 by Princeton University.
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Example sentences
But by simply smashing the tablet, users can foil the time-release action and achieve a high that's been compared to heroin.
The authors reported that the material might be an excellent vehicle for time-release drugs and medical imaging agents.
Medication is also getting stronger as companies develop time-release formulations.
It is a time-release pain medication that, when abused, is dangerous and habit-forming.
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