hypocotyl[hī′pō kät′'l, hip′ō-]
hypocotyl 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.
the part of the axis, or stem, below the cotyledons in the embryo of a plant
Origin: hypo- plush cotyl(edon)
hypocotyl 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.
The part of the axis of a plant embryo or seedling plant that is below the cotyledons.
Origin: hypo- + cotyl(edon).
germination of a bean seed
hypocotyl - Science Definition
The part of a plant embryo or seedling that lies between the radicle and the cotyledons. Upon germination, the hypocotyl pushes the cotyledons above the ground to develop. It eventually becomes part of the plant stem. Most seed-bearing plants have hypocotyls, but the grasses have different, specialized structures.