steam jacket

1 of 2

noun

: an outer casing enclosing a hollow space through which steam is circulated to heat the contents of an inner vessel

steam-jacket

2 of 2

transitive verb

: to enclose in a steam jacket

Word History

Etymology

Transitive verb

steam jacket

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!