(a.) Pertaining to, in the manner of, or designating, a kind of marriage, called also left-handed marriage, between a man of superior rank and a woman of inferior, in which it is stipulated that neither the latter nor her children shall enjoy the rank or inherit the possessions of her husband.
MORGANATIC
Meaning of MORGANATIC in English
Webster's English dictionary. Английский словарь Webster. 2012