Adverbial tandem has 1 sense
  1. tandem - one behind the other; "ride tandem on a bicycle built for two"; "riding horses down the path in tandem"
,Noun tandem has 1 sense
  1. bicycle-built-for-two, tandem bicycle, tandem - a bicycle with two sets of pedals and two seats
    --1 is a kind of bicycle, bike, wheel, cycle
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