Obs. rare. [a. Sp. or Pg. quilate carat.] = CARAT.
1580. Frampton, Dial. Yron & Steele, 170. At the tyme they melt ye gold, that it may fine and ryse of more killats, they cast it [etc.].
1589. R. Parke, trans. Mendozas Hist. China (1854), II. 303. Pearles which do in many killats exceede them that are brought from Baren.