From Longman Dictionary of Contemporary Englishtandemtan‧dem /ˈtændəm/ noun [countable] 1 TTBa bicycle built for two riders sitting one behind the other2 → in tandem
Examples from the Corpus
tandem• Branch manager Richard Fairhurst took a back seat for the day, as he rode along on the back of a tandem.• It stars Erik Estrada, who first became famous as part of the gay motorcycle cop tandem on CHiPS.• It sort of goes in tandem with recovering from the physical pain.• They might be read in tandem as charming examples of Horace in his most fluently cajoling mood.• The tandem of Mitchell and Bookman combined for three touchdowns.• The centre already has a cycle for the less able and two tandems used to transport disabled and blind visitors.Origin tandem (1700-1800) Latin “finally, at length” (taken to mean "lengthwise", and so used for vehicles with one horse or person in front of another) 