plural noun
Bac·​il·​la·​ri·​e·​ae | \-ˈēˌē\

Definition of Bacillarieae 

in some classifications

: a group of algae comprising the diatoms and usually regarded as a distinct class but sometimes especially formerly treated as a subclass and included in the Zygophyceae

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!

First Known Use of Bacillarieae

circa 1890, in the meaning defined above

History and Etymology for Bacillarieae

New Latin, from Bacillaria + -eae

Keep scrolling for more

Learn More about Bacillarieae

Share Bacillarieae

Statistics for Bacillarieae

Look-up Popularity

Time Traveler for Bacillarieae

The first known use of Bacillarieae was circa 1890

See more words from the same year

Comments on Bacillarieae

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


something that serves to warn or remind

Get Word of the Day daily email!

Test Your Vocabulary

Autumn Words of the Day 2018

  • a-top-down-image-of-road-through-an-autumn-forest
  • Which is a synonym of fugacious?
True or False

Test your knowledge - and maybe learn something along the way.

Word Winder's CrossWinder

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!