sustentative

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sus·ten·ta·tion

S0925700 (sŭs′tən-tā′shən, -tĕn-)n.1. Sustenance or maintenance, as with money.2. Something that sustains; a support.
[Middle English, from Old French, from Latin sustentātiō, sustentātiōn-, from sustentātus, past participle of sustentāre, to support; see sustentacular.]
sus′ten·ta′tive (-tā′tĭv) adj.

sustentative

(ˈsʌstɛnˌteɪtɪv) adj1. (Physiology) physiol relating to sustentation2. sustaining