thyridium

English

Etymology

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

Noun

thyridium (plural thyridia)

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