Medical Dictionary

proactivator pro·ac·ti·va·tor (prō-āk'tə-vā'tər)
A substance that, when enzymatically split, yields a fragment capable of activating another substance or process.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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