plural noun
Cryp·​to·​phy·​ce·​ae | \ˌkriptəˈfīsēˌē, -fis-\

Definition of Cryptophyceae 

: a class of motile usually brownish green algae that are sometimes included among the Pyrrophyta and that have asymmetrical compressed cells enclosed in a firm periplast and with the two slightly unequal flagella inserted laterally or terminally

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 Cryptophyceae

New Latin, from crypt- + -phyceae

Keep scrolling for more

Learn More about Cryptophyceae

Share Cryptophyceae

Statistics for Cryptophyceae

Look-up Popularity

Comments on Cryptophyceae

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


a private place of worship

Get Word of the Day daily email!

Test Your Vocabulary

Difficult Vocab Quiz

  • the-education-of-achilles-eugne-delacroix
  • Which is a synonym of discomfit?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

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!