periderm
noun
peri·derm
ˈper-ə-ˌdərm 
: an outer layer of tissue
especially
: a cortical protective layer of many roots and stems that typically consists of phellem, phellogen, and phelloderm
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“Periderm.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/periderm. Accessed 19 Apr. 2024.
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periderm
noun
peri·derm
ˈper-ə-ˌdərm
: the outer layer of the epidermis of the skin especially of the embryo
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