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ampere (n.)

1881, "the current that one volt can send through a resistance of one ohm," from French ampère, named for French physicist André-Marie Ampère (1775-1836). Adopted by the Electric Congress at Paris in 1881. Shortened form amp is attested from 1886.

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Definitions of ampere from WordNet

ampere (n.)
a former unit of electric current (slightly smaller than the SI ampere);
Synonyms: international ampere
ampere (n.)
the basic unit of electric current adopted under the Systeme International d'Unites;
Synonyms: amp / a
From wordnet.princeton.edu