† ˌmalaciˈssationObs.rare. [ad. L. malacissātiōn-em, n. of action f.malacissāre: see prec.] The action of making soft or supple. 1638Rawley tr.Bacon's Life & Death (1651) 48 As touching the Malacissation, or Mollifying of the Members, we shall speak afterward.Ibid. 50.