pedunculationNat.Hist.|-ˈeɪʃən| [n. of condition f.mod.L. pedunculāt-us: see above and -ation.] The formation of a peduncle; the condition of being pedunculate. 1847–9Todd Cycl.Anat. IV. 129/2 Pedunculation (single or multiple) is not uncommon [in lipomata].