mixed doubles

:  combining characteristics of more than one kind

:  combining features of two or more systems of government

:  made up of or involving individuals or items of more than one kind: such as

:  having a twofold relation or character :  dual

:  consisting of two usually combined members or parts

:  being twice as great or as many

:  to make twice as great or as many: such as

:  to increase by adding an equal amount

:  to amount to twice the number of

:  to twice the extent or amount

:  two together

:  downward and forward from the usual position

:  something twice the usual size, strength, speed, quantity, or value: such as

:  a double amount

:  a base hit that enables the batter to reach second base