- 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.
Origin of oidium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
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
December 14, 2013
In the hall they were discussing another and far worse form of oidium.The Patriot
Shortly after the flies had some mouldy cream, the Oidium lactis was found in their fæces.
Berg, in 1839–41, showed that thrush is likewise due to a fungus, Oidium albicans.The Fundamentals of Bacteriology
Charles Bradfield Morrey
In this ripening there is a prompt development of a heavy viscous slime, which consists of Oidium and bacteria.
This occurs very rapidly under the attack of Oidium lactis accompanied by bacteria.
- botany any of various fungal spores produced in the form of a chain by the development of septa in a hypha
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