Definition of teleosteous in English:

teleosteous

Pronunciation /tiːlɪˈɒstɪəs/ /tɛlɪˈɒstɪəs/

adjective

rare Zoology
  • Of or relating to the group Teleostei of ray-finned fishes.

Origin

Mid 19th century; earliest use found in Annals and Magazine of Natural History. From scientific Latin Teleostei + -ous.