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An exogenous spore, not encased in a sporangium.
[exo- + G. sporos, seed]
Farlex Partner Medical Dictionary © Farlex 2012
1. The outermost layer of the wall of certain spores.
2. An asexual spore developed externally by budding, as from a sporophore.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
exosporea type of SPORE formed by MICROORGANISMS by BUDDING, or by the formation of a SEPTUM and FISSION.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005