thyridium

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English[edit]

Etymology[edit]

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

Noun[edit]

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