1) Coal dust 2) Coal dust, British style 3) Soot
Found on
https://www.crosswordclues.com/clue/coom
• (n.) Soot; coal dust; refuse matter, as the dirty grease which comes from axle boxes, or the refuse at the mouth of an oven.
Found on
http://thinkexist.com/dictionary/meaning/coom/
Coom noun [ Confer German
kahm mold gathered on liquids, Dutch
kam , Swedish
kimrök pine soot, smoke black, Icelandic
kām grime, film of dirt.] Soot; coal dust; refuse matter, as the dirty grease which comes from axle boxes, or the refuse at the mouth of an oven.
...Found on
http://www.encyclo.co.uk/webster/C/155
soot; coal dust; smut. · dust, esp. sawdust or dust from a gristmill. · grease from bearings, axles, etc.
Found on
https://www.infoplease.com/dictionary/coom
No exact match found.
