Tan"dem (?), adv. & a. [L. 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.
© Webster 1913
Tan"dem, n.
A team of horses harnessed one before the other. "He drove tandems." Thackeray.
Tandem engine, a compound steam engine having two or more steam cylinders in the same axis, close to one another. --
Tandem bicycle or tricycle, one for two persons in which one rider sits before the other.
© Webster 1913
Tan"dem, n.
A tandem bicycle or other vehicle.
© Webster 1913