# thecium

> English word · Noun

## Definitions
1. The hymenium
2. The internal hyphal layers of an apothecium

## Etymology
From New Latin thēcium, from Ancient Greek θήκιον (thḗkion), diminutive of θήκη (thḗkē, “sheath”).

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