1580s, from French réduplication (16c.), from Late Latin reduplicationem (nominative reduplicatio), noun of action from past participle stem of reduplicare (see reduplicate).
reduplication re·du·pli·ca·tion (rĭ-dōō'plĭ-kā'shən, -dyōō'-)n.
A duplication or doubling, as of the sounds of the heart in certain diseased states.
The abnormal presence of two parts instead of a single part.
A fold or duplicature.