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periderm

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periderm /peri·derm/ (per´ĭ-derm)
1. the outer layer of the bilaminar fetal epidermis, generally disappearing before birth.
2. the cuticle (eponychium and hyponychium), the only part of the periderm persisting after birth.periderm´al

per·i·derm (pr-dûrm) or per·i·der·ma (pr-dûrm)
n.
The outermost layer of the epidermis of an embryo or fetus up to the sixth month of gestation. Also called epitrichium.

periderm
[per′idurm]
the outermost layer of flattened epidermis on an embryo or fetus during the first 6 months of gestation.

periderm
the outer layer of the bilaminar fetal epidermis, generally disappearing before birth. Called also epitrichium.


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Epiphytic on trunks and branches of trees with rough periderm, can form dense mats on clay soil of road cuts.
Irrigation scheduling is used to prepare for the first fall frost by imposing water stress on the vine to encourage periderm formation on green shoots.
Within the surface periderm are vertically oriented fiber masses whose individual cells overlap.
 
 
 
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