Oe·​no·​thera | \ ˌēnəˈthirə, ēˈnäthərə\

Definition of Oenothera

: a genus of mostly North American annual or biennial herbs (family Onagraceae) having usually nocturnal yellow flowers with erect buds and terete seeds in two rows in a capsule — see evening primrose, kneiffia

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 Oenothera

New Latin, from Latin oenothera, onothera, a plant of the genus Epilobium, from Greek oinothēras, onothēras

Keep scrolling for more

Comments on Oenothera

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


a secret plot to overthrow a government

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”?
True or False

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

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!