† ˈknapscapSc.Obs. App. an altered form of prec.; conformed to cap. a1802Jamie Telfer xxxv. in Child Ballads vii. cxc. (1890) 7/2 Willie was stricken ower the head, And through the knapscap the sword has gane.1830R. Chambers Jas. I, I. iii. 94 We find..knapscaps burnished up.