avian dinosaur

plural avian dinosaurs

Definition of avian dinosaur

: a bird when considered as the survivor of a lineage of theropod dinosaurs … thanks to a heap of lovely fossils, we now know that even the most fearsome of the tyrant dinosaurs were closely related to the avian dinosaurs—the birds that flit around our backyards today.— Brian Switek Hardly the embodiment of obsolescence, more than eighteen thousand species of avian dinosaurs flit, trod, and swim about our planet today.— Kenneth Lacovara — compare non-avian dinosaur

First Known Use of avian dinosaur

1999, in the meaning defined above

Keep scrolling for more

Learn More about avian dinosaur

Time Traveler for avian dinosaur

Time Traveler

The first known use of avian dinosaur was in 1999

See more words from the same year

Statistics for avian dinosaur

Cite this Entry

“Avian dinosaur.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/avian%20dinosaur. Accessed 28 Mar. 2020.

Comments on avian dinosaur

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


See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

March 2020 Words of the Day Quiz

  • field of crocuses
  • Which is a synonym of rectitudinous?
Spell It

Can you spell these 10 commonly misspelled words?

Add Diction

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!