duplication

noun

Etymology: From Middle English duplicacioun, from Middle French duplication, from Late Latin duplicātiō, duplicātiōnem, from Latin duplicō. Morphologically duplicate + -ion.

1. The act of duplicating.

   “Another argument for closing Woodhead was simply one of route duplication, and this was the main reason put forward by BR at the time.”

2. A duplicate.

   “Counting crimes as given in the index to the Penal Code, their number is nearly twice as great as that stated, but as some are only duplications I have reduced my estimate that it may be well within the limits of the fact.”

   “Registration of trademarks had been revised and a unit had been set up to clear up duplications.”

3. A folding over; a fold.
4. The act or process of dividing by natural growth or spontaneous action.

   “duplication of cartilage cells”

5. The act of copying a nucleotide sequence from one chromosome to another.
6. A nucleotide sequence copied through such a process.