coom

1 of 2

noun (1)

variants or coomb

ˈküm 

plural -s

1

dialectal, British

a

: soot, smut

b

: coal dust or coal slack

2

: grease exuding from axle boxes or bearings

coom

2 of 2

noun (2)

variants or coomb

" 

plural -s

Scottish

: the wooden centering or frame on which a masonry arch is built

Word History

Etymology

Noun (1)

Middle English culme

Noun (2)

origin unknown

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now