n. 异族结婚

[医] 异族结婚, 异配生, 异系交配

[ noun ]
marriage to a person belonging to a tribe or group other than your own as required by custom or law
<noun.state>

Exogamy \Ex*og"a*my\, n.
The custom, or tribal law, which prohibits marriage between
members of the same tribe; marriage outside of the tribe; --
opposed to {endogamy}. --Lubbock.