| Calx 1. (n.) Quicklime. 2. (n.) 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. 3. (n.) Broken and refuse glass, returned to the post. Thesaurus Entries ash, ashes, brand, carbon, charcoal, cinder, clinker, coal, coke, coom, dross, fume, lava, reek, scoria, slag, smoke, smudge, smut, soot, sullage |