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aecidium

[ee-sid-ee-uh m] /iˈsɪd i əm/
noun, plural aecidia
[ee-sid-ee-uh] /iˈsɪd i ə/ (Show IPA).
Mycology
1.
an aecium in which the spores are always formed in chains and enclosed in a cup-shaped peridium.
Origin
1865-1870
1865-70; < New Latin; see aecium, -idium
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for aecidium

aecium

/ˈiːsɪəm/
noun (pl) -cia (-sɪə), -cidia (-ˈsɪdɪə)
1.
a globular or cup-shaped structure in some rust fungi in which aeciospores are produced
Word Origin
C19: New Latin, from Greek aikia injury (so called because of the damage the fungi cause)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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