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hypocotyl

[ hahy-puh-kot-l ]

noun

, Botany.
  1. the part of a plant embryo directly below the cotyledons, forming a connection with the radicle.


hypocotyl

/ ˌhaɪpəˈkɒtɪl /

noun

  1. the part of an embryo plant between the cotyledons and the radicle
“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

/ pə-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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Derived Forms

  • ˌhypoˈcotylous, adjective
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Other Words From

  • hypo·coty·lous adjective
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Word History and Origins

Origin of hypocotyl1

First recorded in 1875–80; hypo- + cotyl(edon)
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Word History and Origins

Origin of hypocotyl1

C19: from hypo- + cotyl ( edon )
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Example Sentences

Below the sheathing leaf is a narrow length which will be distinguished as the hypocotyl, and where growth is very active.

A lens focusses the light from O, on the hypocotyl, and that from O', on the tip of the cotyledon.

Contrary to generally accepted view the hypocotyl not only perceives but responds to light.

If the cotyledon be shaded and the light be permitted to fall on one side of the hypocotyl, no heliotropic curving takes place.

Hence considerable doubt may be entertained as regards the supposed absence of perception in the hypocotyl of Setaria.

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