periderm

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per·i·derm

 (pĕr′ĭ-dûrm′)
n.
The outer layers of tissue of woody roots and stems, consisting of the cork cambium and the tissues produced by it, such as cork.

per′i·der′mal, per′i·der′mic 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.

periderm

(ˈpɛrɪˌdɜːm)
n
(Botany) the outer corky protective layer of woody stems and roots, consisting of cork cambium, phelloderm and cork
[C19: from New Latin peridermis]
ˌperiˈdermal, ˌperiˈdermic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

per•i•derm

(ˈpɛr ɪˌdɜrm)

n.
the cork-producing tissue of plant stems together with the cork layers and other tissues derived from it.
[1830–40; < New Latin peridermis. See peri-, -derm]
per`i•der′mal, per`i•der′mic, adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

per·i·derm

(pĕr′ĭ-dûrm′)
The outer, protective layers of tissue of woody roots and stems, consisting of the cork cambium and the tissues produced by it. See more at cork cambium.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.