plural noun
Po·​lyg·​o·​na·​ce·​ae | \ pəˌligəˈnāsēˌē \

Definition of Polygonaceae

: a family of herbs, shrubs, or trees (order Polygonales) chiefly of the north temperate zone having mostly entire leaves with stipules forming a sheath round the stem and flowers that are spicate and apetalous and including the buckwheats

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!

Other Words from Polygonaceae

polygonaceous \ ⸗¦⸗⸗¦nāshəs \ adjective

History and Etymology for Polygonaceae

New Latin, from Polygonum, type genus + -aceae

Keep scrolling for more

Learn More about Polygonaceae

Statistics for Polygonaceae

Cite this Entry

“Polygonaceae.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Polygonaceae. Accessed 17 Jan. 2021.

Comments on Polygonaceae

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


Test Your Vocabulary

Words of Snow and Ice Quiz

  • image1037863653
  • Which of the following refers to thin, bending ice, or to the act of running over such ice?
True or False

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


Anagram puzzles meet word search.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!