plural noun

Definition of Angiospermae

: a class of Pteropsida or in some classifications a subdivision of Spermatophyta comprising seed plants (as orchids or roses) that produce seeds enclosed in an ovary, including the vast majority of seed plants, and being divided into the subclasses Dicotyledoneae and Monocotyledoneae — compare filicineae, gymnospermae

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 Angiospermae

1831, in the meaning defined above

History and Etymology for Angiospermae

New Latin, from angi- + -spermae

Keep scrolling for more

Learn More about Angiospermae

Statistics for Angiospermae

Look-up Popularity

Time Traveler for Angiospermae

The first known use of Angiospermae was in 1831

See more words from the same year

Comments on Angiospermae

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


a topic to which one constantly reverts

Get Word of the Day daily email!

Test Your Vocabulary

Where in the World? A Quiz

  • peter bruegel tower of babel painting
  • What language does pajama come from?
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!