From Longman Dictionary of Contemporary Englishcumcum /kʊm, kʌm/ preposition WITHused between two nouns to show that something has two purposes a kitchen-cum-dining room a lunch-cum-business meeting
Examples from the Corpus
cum• a bookstore-cum-coffeehouseFrom Longman Business Dictionarycumcum /kʊm, kʌm/ adverbFINANCE1cum dividend/cum div when the price of shares is listed cum dividend or cum div, the person who buys them will receive the next DIVIDEND payment on themWe can claim any trading losses made by buying stock cum dividend and then selling it ex-dividend against our tax liability.2cum interest when a bond, security etc is cum interest, interest will paid on a particular date in the future, and this amount is included in its trading priceOrigin cum (1800-1900) Latin “with” 