Sustentative
Pronunciation : Sus"ten*ta*tive
Part of Speech : a.
Definition : Defn: 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.
Source : Webster's Unabridged Dictionary, 1913
Merriam-Webster's Everyday Language Reference Set: Includes: The Merriam-Webster Dictionary, The Merriam-Webster Thesaurus, and The Merriam-Webster Vocabulary Builder