A large dragonfly of Eurasia and Africa, Anax imperator (family Aeshnidae), the abdomen of which is predominantly blue in the male and green in the female.
Origin
1930s. After scientific Latin imperator, specific name.
Definition of emperor dragonfly in US English:
emperor dragonfly
noun
A large dragonfly of Eurasia and Africa, Anax imperator (family Aeshnidae), the abdomen of which is predominantly blue in the male and green in the female.
Origin
1930s. After scientific Latin imperator, specific name.