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oidium

[oh-id-ee-uh m] /oʊˈɪd i əm/
noun, plural oidia
[oh-id-ee-uh] /oʊˈɪd i ə/ (Show IPA).
Mycology
1.
one of the conidia that are borne in chains by certain fungi.
2.
(in certain fungi) a thin-walled spore derived from the fragmentation of a hypha into its component cells.
Origin
1855-1860
1855-60; < Neo-Latin < Greek ōi(ón) egg (cognate with Latin ovum; see oo-) + -idium -idium
Related forms
oidioid, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for more oidioid

oidium

/əʊˈɪdɪəm/
noun (pl) -ia (-ɪə)
1.
(botany) any of various fungal spores produced in the form of a chain by the development of septa in a hypha
Word Origin
New Latin: from oo- + -idium diminutive suffix
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Article for more oidioid

oidium

in fungi (kingdom Fungi), a single-celled asexual spore (arthrospore) produced by fragmentation of fungal filaments (hyphae) in lower fungi; the asexual stage of Erysiphaceae (powdery mildew fungi); or, in Basidiomycota, both an asexual spore (microconidium) and a male cell (spermatium).

Learn more about oidium with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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