Webster's Revised Unabridged Dictionary · 1913

Tandem

Tandem (tan"dem) , adverb and adjective

[Latin tandem at length (of time only), punningly taken as meaning, lengthwise.]

One after another; -- said especially of horses harnessed and driven one before another, instead of abreast.

Tandem , noun

1.
A team of horses harnessed one before the other.
He drove tandems. — Thackeray
2.
A tandem bicycle or other vehicle.
Collocations (1)
Tandem bicycle or Tandem tricycle , one for two persons in which one rider sits before the other.