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 of hypocotyl

British Dictionary definitions for hypocotyl


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

Word Origin for hypocotyl

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


  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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