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Meaning of sustained-release

sus•tained-re•lease

Pronunciation: (su-stānd'ri-lēs'), [key]
— adj. Chem., Pharm.
  1. (of a drug or fertilizer) capable of gradual release of an active agent over a period of time, allowing for a sustained effect; timed-release; long-acting; prolonged-action; slow-release.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.