Di·​o·​dia | \ dīˈōdēə \

Definition of Diodia

: a genus of mostly American weedy herbs of the family Rubiaceae with opposite leaves and small tubular solitary axillary flowers — see buttonweed sense 1

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 Diodia

New Latin, from Greek diodos thoroughfare (from dia- + hodos way) + New Latin -ia; from the frequent growth of these plants by the wayside

Keep scrolling for more

Learn More about Diodia

Statistics for Diodia

Cite this Entry

“Diodia.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Diodia. Accessed 11 Aug. 2020.

Comments on Diodia

What made you want to look up Diodia? 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?

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!