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.

ash ashes brand carbon charcoal cinder clinker coal coke coom dross fume lava reek scoria slag smoke smudge smut soot sullage