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The Collaborative International Dictionary
Calxes

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

  1. (Chem.)

    1. Quicklime. [Obs.]

    2. 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.

      Note: Metallic calxes are now called oxides.

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

Wiktionary
calxes

n. (plural of calx English)

Usage examples of "calxes".

Right up to the closing years of the eighteenth century (and in Priestley’s case a little beyond) scientists everywhere searched for, and sometimes believed they had actually found, things that just weren’t there: vitiated airs, dephlogisticated marine acids, phloxes, calxes, terraqueous exhalations, and, above all, phlogiston, the substance that was thought to be the active agent in combustion.

The most useful facet of his talent is that he transforms rocks into calxes, which are used in calculus, so the more rocks he shrinks, the more the effect of his magic grows.