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renewable
renewable energy
renewable resource
renewed
Renfrew
Renfrewshire
renga
reniform
renin
renitent
renminbi
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renin
ren·in [ rénnin ]


noun 
Definition:
 
enzyme released by kidneys: an enzyme released by the kidneys that breaks down proteins and helps regulate blood pressure
[Late 19th century. < Latin ren "kidney"]
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