See urediniospore. 
• (n.) The thin-walled summer spore which is produced during the so-called Uredo stage of certain rusts. See (in the Supplement) Uredinales, Heter/cious, etc.
A type of spore formed by a rustknown as summer spores. InPuccinia graminis the uredospore occurs on wheat. Compare: teliospore. ... (09 Oct 1997) ... 
An asexual repeating spore of the rust fungi.