TANDEM
tandem, in tandem
(adverb) one behind the other; “ride tandem on a bicycle built for two”; “riding horses down the path in tandem”
tandem, tandem bicycle, bicycle-built-for-two
(noun) a bicycle with two sets of pedals and two seats
tandem
(noun) an arrangement of two or more objects or persons one behind another
Source: WordNet® 3.1
Etymology
Noun
tandem (plural tandems)
A carriage pulled by two or more draught animals (generally draught horses) harnessed one behind the other, both providing the pulling power but only the animal in front able to steer. [late 18th C.]
(transferred sense) A bicycle or tricycle in which two people sit one behind the other, both able to pedal but only the person in front able to steer. [late 19th C.]
(figurative) A group of two or more people, machines etc. working together; close collaboration.
Adverb
tandem (not comparable)
One behind the other.
Synonyms
• in tandem
Adjective
tandem (not comparable)
Together; working as one.
Source: Wiktionary
Tan"dem, adv. & a. Etym: [L. tandem at length (of time only),
punningly taken as meaning, lengthwise.]
Definition: One after another; -- said especially of horses harnessed and
driven one before another, instead of abreast.
Tan"dem, n.
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition