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The stem of a seedling or embryo located between the cotyledons and the first true leaves.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Botany) the part of an embryo plant stem above the cotyledons but beneath the terminal bud
[C19: from epi- + Greek kotulē; see cotyledon]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌɛp ɪˈkɒt l, ˈɛp ɪˌkɒt l)

(in a plant embryo) that part of the stem above the cotyledons.
[1875–80; epi- + Greek kotýlē cup]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
Both explants (epicotyls and internodal segments) were placed on Petri dishes containing 20 mL of MT culture medium supplemented with BAP (1.0 mg [dm.sup.-3]) and NAA (0.3 mg [dm.sup.-3]), or KIN (1.0 mg [dm.sup.-3]) and NAA (0.3 mg [dm.sup.-3]).
Growth of epicotyls, turgor maintenance and osmotic adjustment in pea plants (Pisum sativum L.) subjected to water stress.
0.3 g of fresh seedling epicotyls washed with deionized water, placed in tubes with 15 mL of deionized water and incubated for 2 h at 25degC.
Hypergravity increases the molecular Mass of Xyloglucans by Decreasing Xyloglucan-Degrading Activity in Azuki Bean Epicotyls. Plant Cell Physiol.
Several kinds of explants including hypocotyls, cotyledon, leaf petiole, internodes and epicotyls have been used for tomato cultivars (Gubiset al.,2003).
Merr.: plants from tissue-cultured epicotyls," Plant Cell, Tissue and Organ Culture, vol.
After germination, seeds that germinated were counted, that is those which exhibit a breakthrough of epicotyls and output of the first leaves.
Seedlings obtained from cytokinin treatments (24 mg L-1 BA) were stronger with thick hypocotyls, reduced epicotyls and primary roots with few or no lateral root formation.
The roots, hypocotyls, epicotyls, cotyledons and the eophylls were fixed in FAA 50 (formaldehyde, glacial acetic acid and ethyl alcohol) (JOHANSEN, 1940) and Glutaraldehyde (KARNOVSKY, 1965), embedded in historesin (GERRITS, 1991), cross-sectioned on a rotation microtome and stained with toluidine blue (O'BRIEN et al., 1964).
The expression of the CanVLEC gene was specific in seedlings, mostly in hooks and elongating epicotyls, and no expression was detected in adult plants.
The first fully expanded leaves above the third node of the epicotyls, or third node nomofile, were named seedlings with [+ or -] 10 cm in length, and then transplanted to plastic bags with a capacity of 5d[m.sup.3], containing a mixture of fertile soil texture vermiculite medium texture + coconut fiber medium texture + decomposed pine bark medium texture (1:1:1:1, v/v).