Odonata n. pl. : The division of insects that includes the dragon flies.

Example:
what is the Odonata class or phylum?!?

Taxonomy
dragonflies, wings, Odonata Information Network, damselflies, organ, abdomen, Anisoptera, odonates, adults, Odonatoptera, Trueman, free encyclopedia, aquatic insects, transparent wings, male abdomen, suborder, wing shape, pterostigma.

Defination from the web:
Odonata, an order of insects encompassing dragonflies (Anisoptera) and damselflies (Zygoptera) ... dragonflies" belonged to the Protodonata (or Meganisoptera), closely related to true dragonflies but not part of the Odonata in the restricted sense. ...