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semisynthetic

[sem-ee-sin-thet-ik, sem-ahy-]
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adjective Chemistry.
  1. derived synthetically from one or more substances of natural origin.

Origin of semisynthetic

First recorded in 1935–40; semi- + synthetic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
semisynthetic in Medicine

semisynthetic

(sĕm′ē-sĭn-thĕtĭk, sĕm′ī-)
adj.
  1. Prepared by chemical synthesis from natural materials, as of a pharmaceutical.
  2. Consisting of a mixture of natural and synthetic substances.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.