plural noun
Athi·​o·​rho·​da·​ce·​ae | \ āˌthīəˌrōˈdāsēˌē\

Definition of Athiorhodaceae

: a family of small motile sulfur bacteria having polar flagella and red to brown coloration due to various combinations of bacteriochlorophyll and carotenoid pigments

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 Athiorhodaceae

New Latin, from a- entry 2 + thi- + rhod- + -aceae

Keep scrolling for more

Comments on Athiorhodaceae

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


marked by a state of overwhelming emotion

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Latin Quiz

  • roman forum
  • Which of the following months comes from a Latin word for “ten”?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Bee Cubed

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!