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Neptunian
neptunium
NERC
nerd
Nereid
nereis
neritic
Nernst equation
nerol
neroli
nerts
nerve
nerve block
nerve cell
nerve center
nerve cord
nerve fiber
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nephron
neph·ron [ né fròn ] (plural neph·rons)


noun 
Definition:
 
small tube in kidney: a fine tubule in the kidneys of vertebrates that filters and excretes waste materials from the blood and produces urine
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