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exocyclic
exocytosis
Exod.
exodontics
Exodus
exodus
exoenzyme
exoergic
exogamy
exogenous
exon
exonerate
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exophoria
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exospore
ex·o·spore [ éksə spàwr ] (plural ex·o·spores)


noun 
Definition:
 
1. external spore: a spore that is formed outside a parent cell, or outside a spore-bearing organ, especially by extrusion
2. surface layer of spore: the outermost layer of a spore
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