[sin-der] 
| 1. | a partially or mostly burned piece of coal, wood, etc. |
| 2. | cinders,
|
| 3. | a live, flameless coal; ember. |
| 4. | Metallurgy.
|
| 5. | to spread cinders on: The highway department salted and cindered the icy roads. |
| 6. | Archaic. to reduce to cinders. |
| 7. | to spread cinders on a surface, as a road or sidewalk: My neighbor began cindering as soon as the first snowflake fell. |
[slag] noun, verb, slagged, slag⋅ging.| 1. | Also called cinder. the more or less completely fused and vitrified matter separated during the reduction of a metal from its ore. |
| 2. | the scoria from a volcano. |
| 3. | waste left over after the re-sorting of coal. |
| 4. | to convert into slag. |
| 5. | Metallurgy. to remove slag from (a steel bath). |
| 6. | to form slag; become a slaglike mass. |
| cin·der (sĭn'dər) n.
To burn or reduce to cinders. [Alteration (influenced by Old French cendre, ashes) of Middle English sinder, from Old English, slag, dross.] cin'der·y adj. |
| sco·ri·a (skôr'ē-ə, skōr'-) n. pl. sco·ri·ae (skôr'ē-ē', skōr'-)
[Middle English, dross, from Latin scōria, from Greek skōriā, from skōr, excrement, dung; see sker-3 in Indo-European roots.] sco'ri·a'ceous (-ā'shəs) adj. |
| slag (slāg) Pronunciation Key
The vitreous mass left as a residue by the smelting of metallic ore. It consists mostly of the siliceous and aluminous impurities from the iron ore. |