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hypocotyl

[hahy-puh-kot-l]
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noun Botany.
  1. the part of a plant embryo directly below the cotyledons, forming a connection with the radicle.
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Origin of hypocotyl

First recorded in 1875–80; hypo- + cotyl(edon)
Related formshy·po·cot·y·lous, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for hypocotyl

Historical Examples

  • The rodlike part is called the hypocotyl (meaning under the cotyledons).

    A Civic Biology

    George William Hunter

  • Hypocotyle, or Hypocotyl, part of stem below the cotyledons, 11.

  • The part of the stem below the cotyledons (hypocotyl) commonly plays the greater part in bringing this about.

  • In consequence the hypocotyl forms an arch, dragging after it the bulky cotyledons.

    A Civic Biology

    George William Hunter

  • A later stage shows the hypocotyl lifting the cotyledon upward.

    A Civic Biology

    George William Hunter


British Dictionary definitions for hypocotyl

hypocotyl

noun
  1. the part of an embryo plant between the cotyledons and the radicle
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Derived Formshypocotylous, adjective

Word Origin

C19: from hypo- + cotyl (edon)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

hypocotyl in Science

hypocotyl

[hīpə-kŏt′l]
  1. 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.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.