derived synthetically from one or more substances of natural origin.
Origin of semisynthetic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Prepared by chemical synthesis from natural materials, as of a pharmaceutical.
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.