Sustentation definitions

sŭs'tən-tā'shən, -tĕn-
Sustenance or maintenance, as with money.
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Something that sustains; a support.
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A sustaining or being sustained; maintenance, support, or preservation.
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Something that sustains or supports; sustenance.
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The act, or the result of sustaining; sustainment.
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The aggregate of the functions by which a living organism is maintained in a normal condition of weight and growth.
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Origin of sustentation

First attested in 1382: from the Old French sustentacion, from the Latin sustentātio, from sustentō; compare the Italian sostentazione, the Occitan sustentacion, the Portuguese sustentação, and the Spanish sustentación.