rhy·​nia | \ ˈrīnēə \

Definition of rhynia

1 capitalized : a genus (the type of the family Rhyniaceae) of small leafless dichotomously branching fossil plants with terminal sporangia, a primitive stele, and smooth branching rhizomes — compare horneophyton
2 plural -s : any plant or fossil of Rhynia or a closely related genus

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 rhynia

New Latin, from Rhynie, Scotland, where the fossil plant was discovered + -ia

Keep scrolling for more

Learn More about rhynia

Statistics for rhynia

Cite this Entry

“Rhynia.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/rhynia. Accessed 18 January 2020.

Comments on rhynia

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


experienced by way of someone else

Get Word of the Day daily email!

Test Your Vocabulary

The Eponym Quiz

  • rubens painting
  • Which is the best synonym of bowdlerize?
Spell It

Can you spell these 10 commonly misspelled words?

Add Diction

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!