oidium

[ oh-id-ee-uh m ]

/ oʊˈɪd i əm /

noun, plural o·id·i·a [oh-id-ee-uh] /oʊˈɪd i ə/. Mycology.

one of the conidia that are borne in chains by certain fungi.

(in certain fungi) a thin-walled spore derived from the fragmentation of a hypha into its component cells.

Nearby words

oi-, oic, oicel, oidia, oidiomycin, oidium, oik, oil, oil and water don't mix, oil beetle, oil burner

Origin of oidium

1855–60; < New Latin < Greek ōi(ón) egg¹ (cognate with Latin ovum; see oo-) + -idium -idium

Related formso·id·i·oid, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for oidium

The original vines on the estate perished in the late 19th century from oidium and phylloxera, and Klein Constantia shut down.
Drink Like Nelson Mandela: South Africa’s Exciting New Wine|Jordan Salcito|December 14, 2013|DAILY BEAST
Berg, in 1839–41, showed that thrush is likewise due to a fungus, Oidium albicans.
The Fundamentals of Bacteriology|Charles Bradfield Morrey
This occurs very rapidly under the attack of Oidium lactis accompanied by bacteria.
The Book of Cheese|Charles Thom and Walter Warner Fisk
Grape mildew (Oidium Tuckeri) is prevalent in nearly all the vine areas.
Notes on Agriculture in Cyprus and Its Products|William Bevan

This consists of bacteria of several forms, yeasts, Oidium lactis and accidental species of other molds.
The Book of Cheese|Charles Thom and Walter Warner Fisk
In this ripening there is a prompt development of a heavy viscous slime, which consists of Oidium and bacteria.
The Book of Cheese|Charles Thom and Walter Warner Fisk

British Dictionary definitions for oidium

oidium

/ (əʊˈɪdɪəm) /

noun plural -ia (-ɪə)

botany any of various fungal spores produced in the form of a chain by the development of septa in a hypha

Word Origin for oidium

New Latin: from oo- + -idium diminutive suffix

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012