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Meaning of semisynthetic

sem•i•syn•thet•ic

Pronunciation: (sem"ē-sin-thet'ik, sem"ī-), [key]
— adj. Chem.
  1. derived synthetically from one or more substances of natural origin.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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