# pinacoderm

> English word · Noun

## Definitions
1. The outermost layer of cells (pinacocytes) in the phylum Porifera (sponges), equivalent to the epidermis, and characterized as an epithelial layer of flattened cells.

## Etymology
From Ancient Greek πίναξ (pínax, “tablet, dish, plank”) + -derm.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/pinacoderm