%tertiate%

v. t. [ L. tertiatus, p. p. of tertiare to do for the third time, fr. tertius the third. ] 1. To do or perform for the third time. [ Obs. & R. ] Johnson. [ 1913 Webster ]

2. (Gun.) To examine, as the thickness of the metal at the muzzle of a gun; or, in general, to examine the thickness of, as ordnance, in order to ascertain its strength. [ 1913 Webster ]