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Webster 1913 Edition

Adj.

Adapted to sustain, strengthen, or corroborate;

as,

sustentative

citations or quotations

Sustentative functions

(Physiol.)

those functions of the body which affect its material composition and thus determine its mass.

sustentative ‎(comparative more sustentative, superlative most sustentative)

Adapted to sustain, strengthen, or corroborate.
sustentative citations or quotations
(biology) Relating to those functions of the body which affect its material composition and thus determine its mass.