abscisic acid

Science Dictionary
abscisic acid   (āb-sĭz'ĭk)  Pronunciation Key 
A plant hormone that maintains the water balance of plants, prevents seed embryos from germinating, and induces the dormancy of buds and seeds. Chemical formula: C15H20O4.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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