plural noun
Am·​bro·​si·​a·​ce·​ae | \ amˌbrōz(h)ēˈāsēˌē\

Definition of Ambrosiaceae

in some classifications
: a family of herbs comprising all the composites (as ragweeds) that have the flower head subtended by an involucre of separate or united bracts and the stamens separate or merely connivent — see compositae

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!

First Known Use of Ambrosiaceae

1834, in the meaning defined above

History and Etymology for Ambrosiaceae

New Latin, from Ambrosia, type genus + -aceae

Keep scrolling for more

Learn More about Ambrosiaceae

Statistics for Ambrosiaceae

Look-up Popularity

Time Traveler for Ambrosiaceae

The first known use of Ambrosiaceae was in 1834

See more words from the same year

Comments on Ambrosiaceae

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


a haphazard or makeshift solution

Get Word of the Day daily email!

Test Your Vocabulary

Summer 2019 Words of the Day Quiz

  • a-bowl-of-peach-sorbet-with-cut-peaches-next-to-it
  • Which is a synonym of desideratum?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

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!