black ash

1 of 2

noun (1)

1

: a North American ash (Fraxinus nigra) having dark brown heavy wood

called also basket ash, brown ash, hoop ash

2

: an Australian eucalyptus (Eucalyptus stellulata)

3

: box elder

black ash

2 of 2

noun (2)

1

: any of various dark-colored crude products obtained in industrial processes: such as

a

: crude sodium carbonate obtained in the Leblanc process

b

: crude barium sulfide

2

: a black mass containing chiefly soda in the form of sodium carbonate and usually also sodium sulfide with some carbon and produced especially for recovery of its soda content by concentrating and burning black liquor (see black liquor sense 2) in rotary furnaces

Word History

Etymology

Noun (1)

ash (tree)

Noun (2)

ash (combustion product)

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!