The doubling of a word or phrase (as for rhetorical effect).

Roget 161: production, creation, construction, formation, fabrication, manufacture; building, architecture, erection, edification; coinage; diaster^†; organization; nisus formativus [Lat.]; putting together etc. v.; establishment; workmanship, performance; achievement etc. (completion) 729.    flowering, fructification; inflorescence.    bringing forth etc. v.; parturition, birth, birth-throe, childbirth, delivery, confinement, accouchement, travail, labor, midwifery, obstetrics; geniture^†; gestation etc. (maturation) 673; assimilation; evolution, development, growth; entelechy [Phil.]; fertilization, gemination, germination, heterogamy [Biol.], genesis, generation, epigenesis^†, procreation, progeneration^†, propagation; fecundation, impregnation; albumen etc. 357.    spontaneous generation; archegenesis^†, archebiosis^†; biogenesis, abiogenesis^†, digenesis^†, dysmerogenesis^†, eumerogenesis^†, heterogenesis^†, oogenesis, merogenesis^†, metogenesis^†, monogenesis^†, parthenogenesis, homogenesis^†, xenogenesis1^†; authorship, publication; works, opus, oeuvre.    biogeny^†, dissogeny^†, xenogeny^†; tocogony^†, vacuolization.    edifice, building, structure, fabric, erection, pile, tower, flower, fruit.    ... show more

The act of copying or making a duplicate (or duplicates) of something.

synonym: duplication.

Roget 90: duplication; doubling etc. v.; gemination, ingemination^†; reduplication; iteration etc. (repetition) 104; renewal.