abscisic acid[ab sis′ik, -siz′-]
abscisic acid definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
an organic acid, CHO, which acts as a growth regulator causing dormancy and abscission of leaves and fruit
sometimes called abscisin
abscisic acid definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
noun Abbr. ABA
A plant hormone, C15H20O4, involved in the abscission of leaves, flowers, and fruits and the dormancy of buds and seeds.
abscisic acid - Science Definition
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.