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sus•tain•er



Pronunciation: (su-stā'nur), [key]
n.
1. a person or thing that sustains.
2. Rocketry.
a. any stage of a multistage rocket or guided missile that sustains flight after the burnout of the booster.
b. the rocket engine or cluster of engines contained in such a stage.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

sustained-releasesustaining program
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