# thyridium

> English word · Noun

## Definitions
1. A spot in the wing veins of Neuroptera, Hymenoptera and Trichoptera.
2. A spot on both sides of the second abdominal tergite in ichneumonids

## Etymology
From Latin thyridium, from Ancient Greek θυρίδιον (thurídion), diminutive of θύρᾱ (thúrā, “door”).

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