\ ˈterə̇s, ˈtir-\

Definition of Pteris

 (Entry 1 of 2)

1 : a genus of coarse ferns (family Polypodiaceae) having variously divided or rarely simple fronds with a marginal linear continuous sorus and an indusium composed of the reflexed margin of the frond — see pteridium
2 pteris plural pterises : ribbon fern
-p·​ter·​is | \ pt(ə)rə̇s\

Definition of -pteris (Entry 2 of 2)

: fern in generic names GlossopterisOrnithopteris

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.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

History and Etymology for Pteris


New Latin, from Greek pterid-, pteris fern; akin to Greek pteron feather, wing

Noun combining form

New Latin, from Greek, from pteris

Keep scrolling for more

Comments on Pteris

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


transposition of initial sounds of words

Get Word of the Day daily email!

Test Your Vocabulary

Word Puzzles

  • alt 57589b2b4c6a3
  • Which answer pairs best with each of the following words? living, estate, club, music, road, mile
Spell It

Can you spell these 10 commonly misspelled words?

Syn City

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!