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English definition of “ganglion”

ganglion

noun [C] uk   /ˈɡæŋ.ɡli.ən/ (plural ganglia or ganglions) specialized us  
a swelling, often on the back of the handSwellings and lumps a mass of nerve cells, especially appearing outside the brain or spineThe brain and nervous system
(Definition of ganglion from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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