periderm definition

  • noun:
    • The external levels of structure of woody roots and stems, composed of the cork cambium and the cells created by it, eg cork.
    • The external level of plant tissue; the outer bark.
    • The perisarc; the difficult outer level of hydroids as well as other marine animals.
    • The external layer of bark.
    • The hard exterior covering of hydroids alongside marine creatures; the perisarc.
    • In zoology, epiderm or cuticle creating an investing sheath or tube, such as some tubularian hydromedusans; some sort of hard perisarc or cortical level of cœnosarc of certain hydrozoans.
    • 2. In botany, the constant layers of cork which address the stems of several plants when they obtained a specific age.

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  • Sentence for "periderm"
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