from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Prepared by chemical synthesis from natural materials: a semisynthetic antibiotic.
  • adj. Consisting of a mixture of natural and synthetic substances: a semisynthetic culture medium.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. synthesized by chemically modifying a natural material

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. not of natural origin; prepared or made artificially


Sorry, no etymologies found.


  • Since late 2004, OneWorld Health, UC Berkeley and Amyris have been working together as the Artemisinin Project to develop a new, low-cost technology platform to provide non-seasonal, high-quality and affordable artemisinin - semisynthetic artemisinin - a key ingredient in first-line treatments for malaria.

    Richard Chin: New Momentum on Malaria

  • Opium poppy (Papaver somniferum) is the source for the natural and semisynthetic narcotics.

    Notes and Definitions

  • Deck-material makers Trex and TimberTech were early producers of composites blending plastic with reclaimed lumberyard sawdust to create a semisynthetic "lumber" that wouldn't splinter or rot.

    The Price of Going Green

  • A narcotic drug that contains opium, its derivatives, or any of several semisynthetic or synthetic drugs with opium-like activity.

    Alcohol and The Addictive Brain

  • The general values of the rich tropical vascular plant flora as sources of direct therapeutic agents, as sources of starting points for the elaboration of more complex semisynthetic compounds, as sources of substances that can be used as models for new synthetic compounds, and as taxonomic markers for the discovery of new compounds, are highlighted.

    Chapter 7

  • These include the plants manufacturing semisynthetic antibiotics in Havana,


  • A semisynthetic antibiotics plant and an optical complex are currently being completed, and other investments are being made and planned.


  • A product with a moderate, uniform level of Delta-9 THC could be reliably produced by blending marijuana from a high THC strain with low potency material-either marijuana or a semisynthetic cellulose material, as has been developed for tobacco cigarettes.

    Cannabis: The Report Of The Canadian Government Commission Of Inquiry Into The Non-Medical Use Of Drugs

  • Still one more was first produced by Reichstein by a semisynthetic method from a derivative of bile acid and thus being readily available, it has been a valuable remedy in cases of Addison's disease and certain other cases of reduced function of the cortex.

    Nobel Prize in Physiology or Medicine 1950 - Presentation Speech

  • Reichstein and Kendall, and thus a way was opened for semisynthetic production e.g. from the more easily obtainable bile acids or material from a certain species of

    Nobel Prize in Physiology or Medicine 1950 - Presentation Speech


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