vid·ar·a·bine | \ vid-ˈär-ə-ˌbēn 
\
\Medical Definition of vidarabine
: an antiviral agent C10H13N5O4·H2O derived from adenine and arabinoside and used especially to treat keratitis and encephalitis caused by the herpes simplex virus
— called also adenine arabinoside, ara-A
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