# celloidin

> English word · Noun

## Definitions
1. A semisolid solution of pyroxylin in ether and alcohol. Used to embed specimens for microscopy before they are sectioned and placed on slides.
2. A specimen embedded in celloidin.

## Etymology
From cellulose + -oid + -in.

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