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epinephrine

ep·i·neph·rine [ èppi néffrin ] or ep·i·neph·rin [ èppi néffrin ]


noun 
Definition:
 
1. synthetic adrenaline: a synthetic form of adrenaline. Use: to relax the airways and constrict blood vessels.

2. adrenaline: the hormone adrenaline ( technical )

[Late 19th century. <epi- + Greek nephros "kidney"]
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