periderm
noun 2
Definitions
noun
1
The outer layer of plant tissue comprising the phellem, phellogen and the phelloderm.
2
The perisarc; the hard outer layer of hydroids and other marine animals.
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noun
The outer layer of plant tissue comprising the phellem, phellogen and the phelloderm.
The perisarc; the hard outer layer of hydroids and other marine animals.