*calx*

n.; pl. E. Calxes L. Calces [ L. Calx, calcis. limestone; cf. Gr. &unr_; gravel. &unr_;, &unr_;, pebble, Skr. &unr_; gravel, Ir. carraic rock Gael. carraig, W. careg, stone. Cf. Chalk. ] [ 1913 Webster ]

1. (Chem.) (a) Quicklime. [ Obs. ] (b) The substance which remains when a metal or mineral has been subjected to calcination or combustion by heat, and which is, or may be, reduced to a fine powder. [ 1913 Webster ]

☞ Metallic calxes are now called oxides. [ 1913 Webster ]

2. Broken and refuse glass, returned to the post.