plural noun
Per·​o·​nos·​po·​ra·​les | \ ˌperəˌnäspəˈrā(ˌ)lēz\

Definition of Peronosporales

: an order comprising chiefly parasitic lower fungi (subclass Oomycetes) that have equally biflagellate zoospores and conidia which either germinate directly or act as sporangia and contain the families Albuginaceae, Peronosporaceae, and Pythiaceae

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 Peronosporales

New Latin, from Peronospora + -ales

Keep scrolling for more

Comments on Peronosporales

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


of or relating to the heavens

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?
True or False

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

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!