plural noun

in some classifications
: a large order of green algae that includes the families Chaetophoraceae, Trentepohliaceae, Coleochaetaceae, and related forms and sometimes embraces the Ulotrichaceae and related families and also the Oedogoniaceae and that is characterized by a plant body typically consisting of two systems of branching filaments one of which is prostrate and attached to the substratum and the other upright and often possessing hairs or bristles compare ulotrichales

Word History


New Latin, from Chaetophora + -ales

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!

Dictionary Entries Near Chaetophorales

Cite this Entry

“Chaetophorales.” Dictionary, Merriam-Webster, Accessed 25 Jul. 2024.

Love words? Need even more definitions?

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