GC: n

S: http://www.disabled-world.com/medical/spore-bacteria.php (last access: 8 October 2015); https://www.nlm.nih.gov/medlineplus/ency/article/002307.htm (last access: 8 October 2015).

N: 1. «reproductive body in flowerless plants corresponding to the seeds of flowering ones,» 1836, from Modern Latin spora, from Greek spora «a seed, a sowing, seed-time,» related to sporas «scattered, dispersed,» sporos «a sowing,» and speirein «to sow, scatter,» from PIE *spor-, variant of root *sper- «to strew».
2. – a refractile, oval body formed within bacteria, especially Bacillus and Clostridium, which is regarded as a resting stage during the life history of the cell, and is characterized by its resistance to environmental changes.
– the reproductive element, produced sexually or asexually, of one of the lower organisms, such as protozoa, fungi, algae, etc.

S: 1. OED – http://www.etymonline.com/index.php?term=spore (last access: 8 October 2015). 2. http://medical-dictionary.thefreedictionary.com/spore – Dorland’s Medical Dictionary for Health Consumers. © 2007 by Saunders, an imprint of Elsevier, Inc. (last access: 8 October 2015).

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CR: bacterium