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A plant tissue characteristic of the roots, located between the endodermis and phloem.

[French péricycle, from Greek perikuklos, spherical : peri-, peri- + kuklos, circle; see cycle.]

per′i·cy′clic (-sī′klĭk, -sĭk′lĭk) adj.
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) a layer of plant tissue beneath the endodermis: surrounds the conducting tissue in roots and certain stems
[C19: from Greek perikuklos]
pericyclic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈpɛr əˌsaɪ kəl)

the cell layer of the stele in a plant, bounded by the endodermis and the phloem.
[1890–95; < Greek períkyklos. See peri-, cycle]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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References in periodicals archive ?
Pericyclic reactions are likewise a sort of rearrangement reaction.
Mechanical layers may differentiate from the vascular cambium or pericyclic cells, similarly to the non-galled host organs (Fig.
Aloe latex, also known as Aloe juice, is a bitter yellow exudate of the pericyclic tubules in the outer skin of the leaf.
Solitary crystals which are very variable in size and shape (styloids) are characteristically observed and frequently form a sheath along the outer boundary of the pericyclic sclerenchyma (Figure 1).
Other topics are molecular structure and reactivity, general principles for writing reaction mechanisms, reactions of nucleophiles and bases, reactions involving acids and other electrophiles, radicals and radical ions, and pericyclic reactions.
Other pericyclic reactions are in the same category: dipolar cyclo-additions, photochemical 2+2 reactions, and so on.
The leaves measured 9.5 x 1.5cm, had simple and hypostomatic epidermis, hypoderm and groups of sclerified cells within mesophyll, and pericyclic fibers around vascular bundles.
The widest and most important groups of such systems are those based on the reversible light-induced hexatriene/cyclohexadiene pericyclic reactions such as in fulgides (4), diaryethenes (5), spiropyrans (6), and spirooxazines (7).