periderm

noun — 2 senses

noun

Etymology From peri- + -derm.

Biology, Botany, Natural sciences The outer layer of plant tissue comprising the phellem, phellogen and the phelloderm.

Biology, Natural sciences, Zoology The perisarc; the hard outer layer of hydroids and other marine animals.

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.