• synonyms


  1. Botany. the cork-producing tissue of stems together with the cork layers and other tissues derived from it.
  2. Embryology. epitrichium.
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Origin of periderm

From the New Latin word peridermis, dating back to 1830–40. See peri-, -derm
Related formsper·i·der·mal, per·i·der·mic, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for periderm

Historical Examples

  • The development and configuration of the cork cells may change periodically during the formation of periderm.

    Cork: Its Origin and Industrial Uses

    Gilbert E. Stecher

  • When in this manner a continuous layer of cork arises, steadily increasing from the inside, it is termed “periderm.”

  • As the epidermis is at first replaced by the periderm, so in turn is this replaced by cork (the dead tissue).

British Dictionary definitions for periderm


  1. the outer corky protective layer of woody stems and roots, consisting of cork cambium, phelloderm and cork
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Derived Formsperidermal or peridermic, adjective

Word Origin

C19: from New Latin peridermis
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

periderm in Medicine


  1. The outermost layer of the epidermis of an embryo or fetus up to the sixth month of gestation.epitrichium
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

periderm in Science


  1. 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.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.