noun Ar·chae·op·ter·is \ˌärkēˈäptərə̇s\

Definition of Archaeopteris

  1. :  a genus of fossil plants especially characteristic of the Devonian that were formerly regarded as ferns but are now generally included in the order Cycadofilicales

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 archaeopteris

New Latin, from archae- + -pteris

First Known Use: circa 1909

Seen and Heard

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


feeling or affected by lethargy

Get Word of the Day daily email!