oidium

noun
oid·​i·​um | \ ō-ˈi-dē-əm How to pronounce oidium (audio) \
plural oidia\ ō-​ˈi-​dē-​ə How to pronounce oidia (audio) \

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

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Dictionary Entries near oidium

-oidal

-oidea

oidioid

oidium

oiko-

oikomonad

Oikomonas

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Time Traveler for oidium

The first known use of oidium was in 1888

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More Definitions for oidium

oidium

noun
oid·​ium | \ ō-ˈid-ē-əm How to pronounce oidium (audio) \

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 How to pronounce oidia (audio)\ : any fungus of the genus Oidium
3 plural oidia : arthroconidium

More from Merriam-Webster on oidium

Britannica.com: Encyclopedia article about oidium

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