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First attested in 1744–1749; from the Latin sēdecuplus (sixteenfold); compare decuple.


  • (UK) enPR: sē'dĕkyo͞oʹp(ə)l, IPA(key): /ˌsiːdɛˈkjuːp(ə)l/


sedecuple (not comparable)

  1. (rare) Sixteenfold.
    1. Sixteen times as great or as numerous.
    2. (of a ratio) Sixteen-to-one.
      • 1965, Edward Grant [tr.], “Part I of Nicole Oresme’s Algorismus proportionum” in Isis LVI, page 333:
        As an example, let us take a ratio which is two-thirds of a quadruple. Since 2 is the numerator, we shall have one-third of a quadruple ratio squared, namely a sedecuple ratio.
      • For more examples of usage of this term, see Citations:sedecuple.
    3. Comprising sixteen repeated elements.
      • 1967, Charles P. Poole, Electron Spin Resonance, page 544:
        Gozzini and Iannuzzi (1960) proposed the use of sixteen microwave spectrometer systems connected in parallel and fed by the same source. It is interesting to note that this sedecuple arrangement did not burgeon forth from an opulent American laboratory.