n. [ Pref. de- + duplication. ] (Biol.) The division of that which is morphologically one organ into two or more, as the division of an organ of a plant into a pair or cluster. [ 1913 Webster ]

n. [ Cf. F. réduplication, L. reduplicatio repetition. ] 1. The act of doubling, or the state of being doubled. [ 1913 Webster ]

2. (Pros.) A figure in which the first word of a verse is the same as the last word of the preceding verse. [ 1913 Webster ]

3. (Philol.) The doubling of a stem or syllable (more or less modified), with the effect of changing the time expressed, intensifying the meaning, or making the word more imitative; also, the syllable thus added; as, L. tetuli; poposci. [ 1913 Webster ]