Cryp·​to·​gram·​ma | \ ˌkriptəˈgramə \

Definition of Cryptogramma

: a genus of ferns (family Polypodiaceae) of arctic and north temperate regions having indusia formed by the revolute margins of fertile fronds that are much taller and have narrower divisions than the sterile ones — see rock brake

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 Cryptogramma

New Latin, from crypt- + Greek gramma letter, line of a drawing, from graphein to scratch, write, draw; probably from the lines of sporangia, sometimes hidden by the reflexed margin of the frond

Keep scrolling for more

Learn More about Cryptogramma

Statistics for Cryptogramma

Cite this Entry

“Cryptogramma.” Dictionary, Merriam-Webster, Accessed 10 Aug. 2020.

Comments on Cryptogramma

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


Test Your Vocabulary

Original Meanings Quiz

  • rembrandt painting a young scholar and his tutor
  • Which of the following is the earliest known sense of the word awe?
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!