noun Ich·thy·or·nis

Definition of Ichthyornis

  1. :  the type genus of Ichthyornithidae comprising extinct birds of the Upper Cretaceous that have biconcave vertebrae, articulated quadrate bones, sharp conical teeth set in sockets, well-developed wings, and a keeled sternum and that are similar in size and probably in habits to a tern

Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Origin and Etymology of ichthyornis

New Latin, from ichthy- + -ornis

Seen and Heard

What made you want to look up Ichthyornis? Please tell us where you read or heard it (including the quote, if possible).


capable of being understood in two ways

Get Word of the Day daily email!