noun ·Rare ·Advanced level

Definitions

Noun

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

Etymology

From peri- + -derm.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.