plural noun
Ro·​sa·​ce·​ae | \ -āsēˌē\

Definition of Rosaceae

: a large family of nearly cosmopolitan trees, shrubs, and herbs (order Rosales) having alternate usually stipulate leaves, 5-petaled regular flowers with numerous stamens, and dry fruits sometimes on pulpy receptacles — see amygdalaceae

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 Rosaceae

New Latin, from Rosa, type genus + -aceae

Keep scrolling for more

Learn More about Rosaceae

Statistics for Rosaceae

Look-up Popularity

Comments on Rosaceae

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


means, resources, or money

Get Word of the Day daily email!

Test Your Vocabulary

Homophone Quiz

  • three-bears-two-of-them-look-like-theyre-whispering-to-a-third-bear-who-looks-chuffed-to-be-the-center-of-attention
  • In order to judge how people felt, the senator's office hired a firm to take a ______.
True or False

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

Word Winder's CrossWinder

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!