Alethopteris

noun
Al·e·thop·ter·is | \ˌa-lə-ˈthäp-tə-rəs\

Definition of Alethopteris 

: a genus of large fossil seed ferns represented by abundant remains in Carboniferous coal measures and having large bipinnate to tripinnate fronds with the thick pinnules being inserted on the rachis by a broad decurrent base

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!

Other Words from Alethopteris

alethopteroid \¦a-lə-¦thäp-tə-ˌrȯid \ adjective

First Known Use of Alethopteris

circa 1847, in the meaning defined above

History and Etymology for Alethopteris

New Latin, from Greek alētho- (from alēthēs true) + New Latin -pteris

Keep scrolling for more

Learn More about Alethopteris

Share Alethopteris

Dictionary Entries near Alethopteris

alesan

Alessandria

alethic

Alethopteris

alette

aleuriospore

Aleurites

Statistics for Alethopteris

Look-up Popularity

Time Traveler for Alethopteris

The first known use of Alethopteris was circa 1847

See more words from the same year

Comments on Alethopteris

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

WORD OF THE DAY

exaggeratedly or childishly emotional

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Word Winder's CrossWinder

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

TAKE THE QUIZ

Love words? Need even more definitions?

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