oidium

noun
oid·i·um | \ō-ˈi-dē-əm \
plural oidia\ō-ˈi-dē-ə \

Definition of oidium 

1a : any of a genus (Oidium of the family Moniliaceae) of imperfect fungi many of which are now considered to be conidial stages of various powdery mildews

b : one of the small conidia borne in chains by various fungi (such as an oidium)

called also arthrospore

2 : a powdery mildew especially of grapes caused by an oidium

First Known Use of oidium

1888, in the meaning defined at sense 1a

History and Etymology for oidium

New Latin, from o- + -idium

Keep scrolling for more

Learn More about oidium

Dictionary Entries near oidium

-oidal

-oidea

oidioid

oidium

oiko-

oikomonad

Oikomonas

Statistics for oidium

Look-up Popularity

Time Traveler for oidium

The first known use of oidium was in 1888

See more words from the same year

Keep scrolling for more

More Definitions for oidium

oidium

noun
oid·ium | \ō-ˈid-ē-əm \

Medical Definition of oidium 

1 capitalized : a genus of imperfect fungi of the family Moniliaceae including many which are now considered to be conidial stages of various powdery mildews

2 plural oidia\-ē-ə \ : any fungus of the genus Oidium

3 plural oidia : arthroconidium

More from Merriam-Webster on oidium

Britannica.com: Encyclopedia article about oidium

Comments on oidium

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

WORD OF THE DAY

evasion of direct action or statement

Get Word of the Day daily email!

Test Your Vocabulary

Great Scrabble Words—A Quiz

  • scrabble-tiles-that-read-scrabble-quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

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