self-sustaining

adjective
self-sus·tain·ing | \ ˌself-sə-ˈstā-niŋ \

Definition of self-sustaining 

1 : maintaining or able to maintain oneself or itself by independent effort a self-sustaining community

2 : maintaining or able to maintain itself once commenced a self-sustaining nuclear reaction

First Known Use of self-sustaining

1797, in the meaning defined at sense 1

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The first known use of self-sustaining was in 1797

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