oidium
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o·id·i·um
(ō-ĭd′ē-əm)n. pl. o·id·i·a (-ē-ə)
1. A thin-walled spore produced asexually by fragmentation in certain filamentous fungi.
2. Any of various fungi that cause powdery mildew.
[New Latin Ōidium, fungus genus, from Greek ōion, egg; see oo-.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
oidium
(əʊˈɪdɪəm)n, pl -ia (-ɪə)
(Botany) 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 and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
o•id•i•um
(oʊˈɪd i əm)n., pl. o•id•i•a (oʊˈɪd i ə)
(in certain fungi) a thin-walled spore derived from the fragmentation of a hypha into its component cells.
[1855–60; < New Latin < Greek ōi(ón) egg1]
o•id′i•oid`, adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.