Past tense of duplicate; made an exact copy of something or repeated an action or process.
From Latin 'duplicatus,' past participle of 'duplicare' meaning 'to double,' from 'duplex' (twofold). The word entered English in the 15th century through scholarly Latin usage.
The concept of duplication is fundamental to life itself - DNA replication is essentially biological duplication, and errors in this process can lead to both evolution and disease, making copying both creative and dangerous.
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