English Etymology Etymology treeProto-Indo-European *mey-der.?Ancient Greek μῑκρός (mīkrós)Ancient Greek μῑκρο- (mīkro-)lbor.English micro-Proto-Indo-European *ḱers-Proto-Indo-European *ḱr̥sétiProto-Italic *korsōLatin currereOld French correOld French curantbor.Middle English currauntEnglish currentEnglish microcurrentFrom micro- + current. Noun microcurrent (plural microcurrents) An electric current with a very low amperage See also macrocurrent