[ ˌmɔ:gə'natɪk ]
■ adjective of or denoting a marriage in which neither the spouse of lower rank, nor any children, have any claim to the possessions or title of the spouse of higher rank.
Derivatives
~ally adverb
Origin
C18: from mod. L. ~us , from med. L. matrimonium ad ~am 'marriage with a morning gift' (because a gift given by a husband on the morning after the marriage was the wife's sole entitlement).