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Webster 1913 Edition
Mortpay
Mort′payˊ
,Noun.
 [F. 
mort 
dead + E. pay
.] Dead pay; the crime of taking pay for the service of dead soldiers, or for services not actually rendered by soldiers. 
[Obs.] 
Bacon.
 Webster 1828 Edition
Mortpay
MORT'PAY
,Noun.