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sustainer

[suh-stey-ner] /səˈsteɪ nər/
noun
1.
a person or thing that sustains.
2.
Rocketry.
  1. any stage of a multistage rocket or guided missile that sustains flight after the burnout of the booster.
  2. the rocket engine or cluster of engines contained in such a stage.
Origin of sustainer
1350-1400
First recorded in 1350-1400, sustainer is from the Middle English word sosteynere. See sustain, -er1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for sustainer

sustainer

/səˈsteɪnə/
noun
1.
a rocket engine that maintains the velocity of a space vehicle after the booster has been jettisoned
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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