thyridium
English
Etymology
Latin word derived from the Greek word for window thyridion, from diminutive of thyra which means door
Noun
thyridium (plural thyridia)
- (entomology) A spot in the wing veins of Neuroptera, Hymenoptera and Trichoptera.
- (entomology) A spot on both sides of the second abdominal tergite in ichneumonids