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See more synonyms for sustained-release on Thesaurus.com
adjective Chemistry, Pharmacology.
  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.
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Origin of sustained-release

First recorded in 1955–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018