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[ee-see-uh m, ee-shee-] /ˈi si əm, ˈi ʃi-/
noun, plural aecia
[ee-see-uh, ee-shee-uh] /ˈi si ə, ˈi ʃi ə/ (Show IPA).
the fruiting body of rust fungi, which bears chainlike or stalked spores.
Origin of aecium
< New Latin < Greek aikíā assault, injury; see -ium
Related forms
aecial, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for aecium


noun (pl) -cia (-sɪə), -cidia (-ˈsɪdɪə)
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
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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aecium in Science
  (ē'sē-əm, ē'shē-əm)   
Plural aecia (ē'sē-ə, ē'shē-ə)
A cuplike structure of some rust fungi that contains chains of aeciospores. Aecia usually form on the bottom surface of leaves.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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