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[yoo r-i-din-ee-uh m] /ˌyʊər ɪˈdɪn i əm/
noun, plural uredinia
[yoo r-i-din-ee-uh] /ˌyʊər ɪˈdɪn i ə/ (Show IPA)
Mycology. the fruiting body of the rust fungi that bears urediospores.
Also, uredium.
Also called uredosorus.
Origin of uredinium
1905-10; < New Latin < ūrēdin- (stem of Latin ūrēdō; see uredo) + -ium -ium
Related forms
uredinial, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for uredinium
  • Each uredinium provided sufficient spores to inoculate a differential host series.
  • One week after inoculation, leaves were trimmed so that only one uredinium per plant remained.
  • Heavy infection is not rare, causing entire leaves to become yellow or brown with dense uredinium and/or telium production.
  • One week after inoculation, the leaves were trimmed so that only one uredinium remained on each plant.
British Dictionary definitions for uredinium


noun (pl) -dia (-dɪə), -dinia (-ˈdɪnɪə)
a spore-producing body of some rust fungi in which uredospores are formed Also called uredosorus
Derived Forms
uredial, adjective
Word Origin
C20: from New Latin, from uredo
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
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