Dictionary
coom
Pronunciation: (kOOm), [key]—
n. Chiefly Scot. and North Eng.
1. soot; coal dust; smut.
2. dust, esp. sawdust or dust from a gristmill.
3. grease from bearings, axles, etc.
Also,coomb.Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.