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co·ac·tor | \ ˌkō-ˈak-tər 
\
\variants:
or co-actor
plural coactors or co-actors
Definition of coactor
: one who acts with another : a fellow actor
… it's a worthy script with a number of worthy coactors.— Morgan Freeman
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Time Traveler for coactor
The first known use of coactor was in 1640
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